One of comedy's most innovative and inventive thinkers, Dave Gorman is back and this time he's part of a double act… with a projector screen.

Dave's new show PowerPoint Presentation has been a triumph on tour, and sees the welcome return of the inspired narrative style of comedy he has pioneered.

The thing about Mr Gorman is that he never does things by halves. Most famously, his show Are You Dave Gorman? saw him travelling the world looking for namesakes, and in 2003's Googlewhack Adventure, he fell under the spell of an obscure internet word game that led him on a life-changing, globe-trotting journey.

In fact, the last time we spoke, Dave was in the middle of an impressive cycling feat, travelling to the four corners of the British mainland — more than 1,500 miles. If that wasn't enough, over the 33 days it took, he performed at 32 gigs.

The show, Dave Gorman: Sit Down, Pedal, Pedal, Stop And Stand Up was a hit, but was it worth the thigh-shredding torture?

"Actually, it turned out to be a brilliant experience," he assures me. "About three or four days in I was thinking 'Oh dear, I've made a terrible mistake', but then suddenly after a week or so I got so fit I could do anything. I was more fit than I'd ever been."

So did he maintain his exercise regime after the tour?

"I kept it up for less than a week," he admits with a sigh. "The bad thing about getting that fit was that my appetite changed.

"When I was cycling I could eat anything and I actually needed to eat several thousand calories a day.

"When I finished, I didn't get on the bike again but I did continue to eat several thousand calories and piled on the pounds.

"During the tour I didn't actually lose any weight, instead my body shape changed and for the first and last time in my life I had abs!

"But they disappeared very quickly – and then the fat came. Those muscles are just a distant memory now."

You can't help but be swept along when watching one of Dave's live shows, chiefly thanks to his passion and enthusiasm as a storyteller.

"My time on stage is a joy," he tells me. "I enjoy it and I think that comes across.

"PowerPoint Presentation in particular is a really, really fun show to do and feels really energising. I think I've lost about six pounds performing it."

"I sound like I'm obsessed by my weight, don't I?" he laughs after a long pause. "I honestly don't go on tour just to improve my fitness levels!"

With a giant screen looming behind him, Dave leads his eager audiences through the labyrinths of the internet, taking in the marketing strategies of smartphones, his relationship with Jim Davidson, the obsession with his Jewishness and asparagus.

The comic has turned using PowerPoint into an art form, repeatedly wrongfooting the audience's expectations.

"It's difficult to describe it in any more detail without giving anything away," he muses. "A friend of mine said it's doing everything Are You Dave Gorman? and Googlewhack did, just without the physical journey."

The idea stemmed from the rousing success of the finale of his last show – a 20-minute section involving PowerPoint.

"The screen would be revealed and it always got a great reaction," he recalls. "To me, it felt like pudding at the end of a nice meal.

"After that, every time I thought about new material, I imagined it on PowerPoint.

"It's not a gimmick – I wouldn't use it if I didn't honestly think that the show would be better for it. For example, if you want to forensically examine an advert and point out what's stupid about it, showing it in a series of 10- second clips allows you to be really precise about the detail you're tearing apart, rather than just talking about it as a whole, which is quite limiting and loses impact."

The comic is simply impossible to label or box, which is a treat for audiences as his shows are unpredictable and often take off at unexpected tangents. But is this unpredictability a help or a hindrance in the industry?

"Both, I think. TV is expensive, so naturally they want to know what they are going to get for their money.

"But with a lot of what I do, I don't know what's going to happen; my shows are all about the finding out and understandably TV execs don't want to take that risk. So that makes me and TV a very difficult fit."

Despite this, 2011 has been extremely busy for Dave. This year has seen him release his fourth book, Dave Gorman Vs the Rest of the World, host his monthly comedy night in London and headline Dave's One Night Stand on TV.

He also recently became the Curator on the popular Museum of Curiosity for Radio 4, following in the footsteps of Bill Bailey and Sean Lock, and continues to present his hit Sunday morning show on Absolute Radio.

Dave concludes: "Doing different projects keeps me enthused about the next one, and I'm feeling very enthused about this tour. I'm having a great time."

Dave Gorman plays Colston Hall on Saturday, November 12, at 8pm. Tickets cost £20. Tel 0117 922 3686