How do you do a flying tackle/Knockdown in d20? what mechanic can you use to do this? If a character charges and wants to do a flying tackle (think NFL here) how do you handle it?
I would make it an (unarmed) Trip attack. I would give a +2 circumstance bonus for the 'tackle' aspect if the character charges at least 10 feet in a straight line and ends up prone next to the 'victim'.