Karl Kicks His Height
As a kid, Karl once "kicked his height" per his father's challenge. One summer's day in the era where Kung Fu was popular, Karl was outdoors playing around punching a tree. Mr Pilkington said he bet Karl couldn't kick his own height, and Karl did it but didn't put his foot down quick enough and landed on his back on the concrete.
Quotes
Karl: "I was that chuffed that I got that high, that I didn't think of putting me leg back down again"
Steve: "'I kicked me height' - it's not a well-known phrase! You can't just go 'I kicked me height'!"
Ricky: "What sort of a kid he must've been!"
Ricky: "The other kids must've been saying 'get Karl Pilkington to try and kick his height, I bet he falls on his arse like a fucking penguin!'"