Conversation so far:
When did the band form?
September 1984.
What was significant about the formation?
The band was initially named Mogo, and played their first show on University of Massachusetts Amherst campus.
Why did they change the name?
Mascis was so appalled by Nakajima's behavior at the show that he disbanded the group the next day.

Question: What did Nakajima do at the show?
Self-contained rewrite: What did Nakajima do at Mogo's first show on University of Massachusetts Amherst campus that disgusted Mascis?