Found by Kian:
08:47:55 Robert James Dennington (Tinytimrob): what were you trying to do?
08:48:11 Kian Bradley (kian93): I was walking and jumping around
08:48:18 Robert James Dennington (Tinytimrob): did you change any keybinds?
08:48:39 Kian Bradley (kian93): no, all i changed was render dist to far and changed rei's minimap scale to Large
Interestingly the crash dump box was empty.