I think it's because usually the punchline is too long
He thought it was such Bolshevik.
He thought it would help him with his hit detection.
an explosive punchline
A Brazilian. Saw this joke elsewhere and thought i'd share it here.
You skip the punchline.
Don't worry, he will inform you after delivery of the punchline has taken place. Just a joke!
The punchline is too long.
The punchlines are too long.