Normally you can start throwing a Pipe and run around, then stop throwing and keep the Pipe by switching to another Weapon.
While incap you can start throwing and hold it but can't stop throwing.
If you select another Weapon, the Pipe is thrown before switch...
Dunno if this is better to understand
Throwing Pipe while incap is very nice, so who cares?
Moo,
OtterNas3