Physics professor discussing elastic collisions gets a cup check.
Zandor - 2 years ago
5 stars: Get the rating up and vote it to the homepage. All proceeds go to the school's charity drive!!!
Azbone - 2 years ago
yaya.. tennis ball yaya.. that really hurd.. yaya....: sux :/
TAz00 - 2 years ago
HAHA PENUS: no, not really
