Why is fixed better on wet?

I enjoy doing that but *with *the back wheel locked up, and let the bike skid over whatever rocks n crap in the way.

And why do you want to pull endo's?

Twisted Endo + Trackstand = Quick U-Turn.

Something like this ... http://www.youtube.com/watch?v=8Bp8X2g1AR4

But on a mountain bike

Though I am pretty rubbish at performing bike tricks.