You Had One Job
When it's an ideal opportunity to take that pre-prom picture, the photographer has just one job: to take a decent photograph that can be recollected and appreciated until the end of time. There is no requirement for extravagant angles and filters – just pick a nice backdrop and snap a good photo.
This person's father totally missed the memo and neglected to master perhaps the most effortless undertaking of his life – taking his child's photograph without horrifying everyone in the background. Tragically, the mirror was poorly situated, so they will consistently be reminded that he was in his underwear when he sent his child off to prom.