So, this idea came to me, literally, in a dream just before I woke up this morning.
Every time Clark wears the Superman suit, he turns into a klutz of epic proportions. Out of the suit, he's fine. Why? Did some Red K get onto the suit? Did someone magical hex it? Did Tempus meddle wit things? Is Mxy playing a prank? Did Dr. Klein accidently do something to the suit? Is it just one specific Superman uniform that turns Clark klutzy or is it all of them? What kind of shenanigans ensure?