Originally Posted by chriszeh
I've never actually thrown a weight just do this in case.
In my experience weights usually aren't "thrown" since the centrifugal force keeps them pressed against the wheel and rotation keeps a little bit of airflow going. It when you pull into the pits and the radiant heat continues to heat up the weights and loosen the glue... I've pulled in to the pits and hung out next to car and heard a weird "clink clank" and found the weights lying in the barrel or on the ground.