Just for the record, I did NOT laugh or smile at that part.
Wait wait wait... maybe you're not getting the joke.
See she was trying to crowd surf... and the other girl did it successfully first... so that would lead her to believe she could do it as well.
Then she jumped off the stage, and the crowd moved.
You see the comedy comes from the expectation that they would catch her, but then didn't.
THEN, when she's on the ground, she says something about it being a woman thing or a black thing... which is funny cuz she is both those things (though it was just proven that there was a woman just crowd surfing, so it must be a black thing)
Maybe the joke would have been funnier if it was a "metal proton accelerator on my back or black thing"...
Or maybe funnier if she said "A 'Mean Girls' thing or an 'old comedy trope' thing"?
What would have been hilarious, is after she landed she should have said "HEY! I was trying to CROWD SURF!"
And then someone could say,
"OH! You were going to Crowd Surf!?! That's awesome! I love Crowd Surfing! I totally would have helped you crowd surf..."
(beat)
"What's a Crowd Surf?"
btw... I'm bored and being facetious.