Tackling USED to mean dragging a player to the ground. Now its a massive collision usually with 1 running at full speed and when you tackle you are taught to run through your opponent...in rugby there's less of a collision for the most part especially when you factor in kickoffs and the forward pass.

I used to crackback on guys all the time which is the art (yes its an art form) where you hit someone who never sees you coming. You've got to have great peripheral vision and talent to dish those out and not receive them...bone crushing hits, I loved them!