I'm generalising, and present company excepted.
But I have seen this a few times.

I shall relate a story though, which isn't directly mine.

We had a futures trader working with us a few years ago, and he was a bit of a lad, in a job that is notorious for wide boys. One of our clients organised a day of kayaking at some white water rafting place.

Apprently they all turned up in jeans and trainers (the place they booked at would supply all the gear), apart from one nerd who appeared in wetsuit, splash jacket, gloves and helmet, carrying his own paddle, and declared he didn't need any instruction, he was an expert kayaker.

Legend has it he rolled over almost immediately he hit the water, cut his forehead open and was carted off to hospital for stitches. The rest of them spent half an hour capsizing, got changed and spent the rest of the day in the bar.
(username failed moderation, Mon 23 Apr 2012, 12:45, Reply)