Molding (decorative) Puns

Not a dad, but this is in line with it all.
It was a party around Halloween-time, but not specifically a Halloween party. Things were wrapping up, people were heading out and my roommates were saying goodbye.

They were doing some goofy ass handshake, bumping fists, slapping, all that dumb shit.

While they're wasting time, I look on the table and see various Halloween decorations, including body parts made out of Jell-O. They're slightly jiggling, as all Jell-O molds seem to do.

I quietly mumble "Hehe... handshake."

The host of the party looks at me and says "Are you making fun of our hand shake?"

Without saying anything else, I reach over to the table, pick up the plate the Jell-O zombie hand is on, hold it close to his face, wiggle it back and forth and repeat "Hand shake".

He grabs me by the back of my shirt and drags me out of the apartment. I thought it was funny.