I remember seeing on NFL Network's "Hard Knocks" with the Cowboys, Tony Romo said he used to try and overthrow Owens for fun, but could never do it. Owens always turned it up no matter how far Romo threw it.
I've seen highlights of Owens' teammates running in the clear, as fast as they can, with defenders chasing them as fast as they can, and all of a sudden Owens comes from the bottom of the screen like everyone else is jogging, and he gets in front and makes a block. I've seen that a bunch of times, the dude is a speed demon when necessary.