Ready, go. Now. Seriously Go!
This is Mark Rippetoe, he is a strength coach that has reached internet legendary status. I'm not a die hard Rippetoe fan like some, but I do appreciate his work. Same idea goes along with Crossfit, this is a seminar that just happens to have been done in a Crossfit gym, this is not a recommendation for Crossfit.
Rippetoe coaching the deadlift