Unusual Stage Hypnosis Show!

Well 17 years as a full time professional stage hypnotist has taught me to expect the unexpected!
Recently I got a short notice job from an agent for a college show in Suffolk, I presumed it must be a last minute freshers job, how wrong I was to be!
On arrival at said college, it turns out to be a very up market boarding school and I am actually booked to perform at the house dinner, my audience will be about 14 adults (teachers and partners etc.) plus about 80 boys aged 13 to 17.
So, after a quick emergency re-think of my patter and material I eventually get on after the meal and teachers speeches. I do my intro patter and ask for volunteers as usual and then I get mobbed! Left in my audience are the 14 adults and about the same boys, all the rest are now on stage wanting to be hypnotised!
Needles to say, I have to whittle this down loads then we have a fantastic night that everyone is really pleased with.
But the unexpected does not stop there, when I go to collect my fee I get paid £40 in pound coins and the rest in £5 notes. It turns out the boys have paid for it themselves and collected the money in like that!