Not a huge one, but last night put my hand in my pocket to pull out a plectrum as the song started... and found my car keys. Managed to find it in about a bar.
Biggest near-cock up was getting overexcited playing a 5 on the last encore and switching in chorus, then a HM2, then an octaver and enjoying some huge low notes.
At the end I turned round and my amp head was rocking on the edge of the speaker cab like the bus in the Italian Job.