1. When years of eating non-emergency Domino's Pizza, Taco Bell and McDonald's finally catches up to you and you just need something to tide you over while you are waiting for the paramedics to respond to your 9-1-1 call.
2. When people you don't like show up unexpectedly and are clearly not going to leave before you planned to have an actual dinner. Serve them this and have a late meal after they've finally left.
3. When every pizza place on Earth except Domino's is closed, every grocery store has been wiped out by a plague, and you key broke off the tin of the 20-year old can of Spam in your cupboard.
4. When it's December 31 and you've decided that your New Year's Resolution is to just say to hell with all of it, you've had enough.