An IRS audit triggers a multiverse crisis, which is honestly the most realistic tax-season plotline going.
Fun fact: Ke Huy Quan hadn't had a major acting role in over 20 years before winning the Oscar for this.
Basically an entire generation sat around waiting for an owl that was never going to come.
Fun fact: "Robin Williams offered to play Hagrid for free but was rejected because Rowling required an all-British cast."