Not sure if it counts but the devonian extinction is probably my favorite. Wiped out a bunch of marine vertebrates (I hate fish, they had it coming)
The theories behind why it happened changed, and it's technically two small extinction events. Although it is pretty big iirc >95% of the worlds vertebrates died off and did not come back
One time I found jeans at Costco for <10 USD, didn't need any but you might as well try