This is because I hate you guys.
A teenage boy is getting ready to take his girlfriend to prom. First he goes to get a tux but there's a long tux line at the shop and it takes forever.
Next, he hast to get some flowers so he goes to a florist and there is a huge flower line there. It takes forever but he gets the flowers.
Next he heads to get a limo, unfortunately there is a long limo line at the rental office and it takes a long time but he gets the job done.
Finally the day of the prom comes and the two are dancing happily and are having a good time. When the song is over she asks him to get her some punch, so he heads over to the punch table and there is no punchline.