Is there a name for laughter that happens when you're infuriated?
Solution 1:
This could be a form of manic laughter, which happens when someone is just too revved up that the laughter spills out of them.
If the exasperation that boils over into laughter is scornful or mocking, it could be called sardonic laughter.
But when it’s the kind of thing you see in cartoon caricatures of evil characters, then it’s maniacal laughter.