I don't find that clip funny at all, actually. Yes, male strangers behaving erratically late at night are scary, and I'm sorry that happened to her. And fine, he was the one who overtly brought race into it, but I'm not sure his assumption was unreasonable, given the likely differences in their life experiences. Does a false assumption really justify her faking African-American speech patterns for most of the rest of the skit? What might the same story look like from his point of view, as someone who has presumably been dealing with racism and perhaps poverty all his life, and doesn't actually appear to have made any move to assault her? He followed her, yes, but for all we know he was going to ask her for money, or a light, or wasn't interested in her at all, but had just decided to give up waiting for his mates or whatever else he was actually doing pacing in and out of the alley in a very attention-grabbing way (not the most likely move for an actual rapist.)

The skit also seems to me to perpetuate the false dichotomy that a fear that is primarily motivated by experience of sexism cannot also be secondarily motivated by racism, and the false perception that it's even possible for a white person in a modern Western society not to be a racist, at least to some degree. I think the famous Schrodinger's rapist post makes her point much better, without the intersectionality fail.