You don't dive at a pylon though, you only dive to avoid being tackled/stepping out of bounds, before your arm crosses over an imaginary line Yes, you do dive at a pylon, because touching the pylon is a touchdown, and that exact point is often the best route to take toward the endzone because of the angle the potential tacklers are taking to try and tackle you, since standing on the sideline would be a waste of space. What are you talking about? The line isn't imaginary, and neither is the pylon. You don't know football.