Its going to be hard to top this for a tackle this weekend. Last night the Cleveland Browns Josh Cribbs was knocked out from a tackle he received in the first quarter in the Browns 23-16 loss away to the Baltimore Ravens. On first viewing, the tackle doesn't look that bad, but when you see the slow-mo close up shots of the tackle you can see the sheer velocity of the tackle.
[youtube]http://www.youtube.com/watch?v=to0JO09mvPQ[/youtube]