Child's Play has special meaning to me. It's the first Riff I remember ever doing. I was about 10 years old. For those of you who have seen the movie, here's my amateur riff:

On his birthday, all Andy wanted was a Good Guy doll, but his mom got him clothes instead. The next day, his Mom brought home a Good Guy doll wrapped in paper bags, saying "these aren't groceries."

Then I riffed, "More Clothes!" It got laughs.

Not the best of riffs, but it's special to me.