i think a pretty fun joke would be for every astronomy professor in the world to cash out their savings accounts on the same day and then just like hide for three weeks.
When I started grad school, my wife and I bought a couch financed by what we later found out was a payday lender. They literally had repoed couches in their lobby when we'd go to make a payment.
When I got my job post-Ph.D., we'd hit the big time and bought an IKEA couch.
Dolla dolla, y'all.