My favourite experience of this was when a chap at work collapsed for some reason (still not sure why). We had a first aider and he came equipped with a defibrillator. We were obviously all as keen as mustard that he use this on the collapsed chap - on the grounds that we'd never seen one used before and thought it would be a giggle. Sadly, though, the first aider bottled it - much to everyone's disappointment - and the collapsed chap revived and was carted off in an ambulance.
Can't believe he passed up the opportunity to shout the classic 'clear!' ****er imo
'Seems that I was busy doing something close to nothing
But different than the day before'
'Met a dwarf that was no good, dressed like Little Red Riding Hood'
'Now you're unemployed, all non-void
Walkin' round like you're Pretty Boy Floyd'