One that my brother kindly likes to bring up, when the crowd is big enough, is when me, him and my girlfriend at the time back in the early 90's decided to visit Butlins for the day, as we were down that way visiting family anyway and it was only round the corner from their house.
We'd had a look around then decided to go into their swimming pool.
I've never really been a fan of swimming but went along and was then faced with the water chutes which i had never been on before.
Being a complete newbie, i went for the 'beginners' chute, thinking nothing of it.
I wore glasses back then and they were back in the locker so my eyesight was far from sharp from the off.
So they went before me then i followed a bit after, and as i approached the bottom of the slide the water sprayed off of my feet straight into my eyes blinding me then there was silence as i went under the water so now i can't hear or see properly.
In a state of panic, as i had no idea what sort of water i was in, i started flapping about like there was a shark attack thinking i was about to drown in water out of my comfort zone.
Meanwhile, my brother and my girlfriend are standing there and get approached by some 8-10yr old kid who had just gone before me and asked them "What is that man doing in the water?"
They were just as bewildered as him and could only answer "Dunno?" whilst uncomfortably laughing under their breath.
Then i suddenly felt my hand hit the floor, stopped thrashing about, and stood up.......in probably less than 3 feet of water.
NOW they very comfortably started pissing themselves laughing, and to this day still won't accept my theory that if you're lying down in 40 feet of shallow water it still makes it 40 feet deep.