Shark week is a week long event where the discovery channel plays all tv programs that are about sharks.
The craziest thing on bull sharks are they are very smart, In S. aFRICA they've discovered that its easiest to get food by shadowing fishing boats, theyre in the rivers, and steal the fish off the hooks.
They'll be 20ft from swimmers, but know its easier to just follow the fishing folk, so they're left alone.
Now Australia is scary, cause the bull's have migrated up the rivers hundreds of km, during floods, and get stuck behind the damns.
Enev the US has found bulls almost to the Great lakes, going up the missisippi, i believe.