Here's three videos ive found. Ive only ever heard about the drink of beer on his last lap but never seen it:

http://www.youtube.com/watch?v=kZWzN...eature=related

next clip is from Namur 1979 GP. The track hasnt changed much in that time, I went to the last two GP's they held, and its more or less the same as it was 30 years ago.

http://www.youtube.com/watch?v=LSOncRv_oEU&NR=1

Last clip is crazy, it looks more like a cross country/gncc track than a motocross track. That downhill looks pretty nasty as well!

http://www.youtube.com/watch?v=RiLWs...eature=related