Boisterous Irish stand-up Jason Byrne has been a prolific performer on the British comedy circuit since 1996.
He is a master of the callback and an expert at ad-libbing with the audience - his strongest material can often be what he's made up on the spot and his energy, never once pausing for breath or running out of steam, is seriously impressive.
If loud, excitable comedians aren't your thing then you probably won't like him but his fan base is huge - he was the biggest selling comedian of 2007.
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