Yeah, I ALWAYS wear a pair of Birkenstocks. Haven't worn any other footwear since about 1993. Well- I do own a pair of shoes somewhere, but that's for cold weather.
I do suggest anyone who's not an ass-kicking pro destroyer like myself to wear appropriate footwear!
Funny part is- the guy in boots was the one to get a nail all the way into the sole of his foot! ouch! Isn't it fun working in a big patch of roofing nails?
When I worked at the steel shop it was steel toed Redwings exclusively. Them damned Wolverine "boots" didn't last six months. I'd get about two years out of a pair of Redwings. I have horrible feet, so footwear is one thing I can't cheap out on at all.