Catch it in the Winter!
or
It's something I could really see myself doing.
or
One has claws at the end of its paws and one has a pause at the end of its clause
or
Bike helmets don't fit hippos
or
None. There never was any light bulb.
Notes: Probably the only really good light bulb joke of 1984.
or
None, because they were copycats
or