¿Qué significa looking to score an easy punchline on ?

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In case you missed its big moment at the end of October, here's what you need to know about the Mannequin Challenge, the trend that has the nation's teens frozen in place: A group of people stops what they're doing, staying extremely still while someone walks through the scene taking 360 video. Then the whole thing is set to music—usually Rae Sremmurd's "Black Beatles"—and it goes online.

It's a cool and harmless trend, but leave it to the internet to find a way to make it into a mean joke. Some cool guy asked Michael J. Fox, the Back to the Future actor who was diagnosed with Parkinson's disease at age 29, if he'd be participating in the challenge.

He was probably looking to score an easy punchline on Fox, whose Parkinson's comes with uncontrollable shaking, not expecting the actor to respond.

But Fox did respond, brilliantly.

"SMH," he wrote. Shaking my head.