The sinking feeling you get when you have looked forward to working on your project for a week and your gf tells you that the inlaws will wisit on your only free days in 2 weeks.. Please aliens take me awayyyy.

Worst mistake? Well nothing to bad since it only affected me. Tried out of curiosity to instantate an object every frame in unity that ran an infinite loop every frame. It crashed not only unity but also my computer resulting in about an hour of lost work :P