My 2pence worth
A friend and I had been to the beach for the day - we'd decided to walk to the fort, from where we stood on the beach, it didnt seem that far - and we couldn't see the massive body of water that was between it.
We got to the edge of the beach, and decided that it was too far, and should go back to dry land, silly idea anyway.
(After looking on Google Earth just now, it is around 1/2 a mile off shore.)
To save time, we cut through what looked like a puddle on the beach, rather than walk around it - only it wasn't just a little puddle. The water level rose over my nipples and I couldnt swim, my friend started to swim towards me - being a young punk, i was wearing military boots and a backpack as was the done thing back then. I may as well have been wearing diving boots with bricks in my bag.
Luckily as I carried on walking, the water level dropped and I got out unharmed.

We walked into the town through the backroads, and had to cross a train track, with Cleethorpes being a seaside resort, we thought the track was just for one of them crappy little choo-choo trains that drives people around the sea front, it wasn't until we shut the gate behind us - we realised it wasn't, it was actually a working trainline - the single carriage that whooshed past reminded us of that, a few seconds later and we'd have been under that train.

At Leeds Festival 2002 - with the same person, we were watching the toilet fires and noticed a large Calor gas bottle in the middle of it
'If that blows up, it's going to kill somebody' I said
So what did we do? Walked into the enclosure and carried the gas bottle out through the flames.

Few other times not worth mentioning, mainly due being a bit nutty on a pushbike.
(Davethefan began lurking again on or around, Fri 13 Feb 2009, 17:24, Reply)