Ultra Sans

General
Ultra sans is one of the hardest bosses. Ultra Sans is a skeleton flying around the map shooting insta kill beams from his torso, eyes, and arms. Ultra Sans is also accompanied by 3(?) gaster blasters that also shoot insta kill beams, surviving awards 150000 points.

To survive, either be in a mech and stay COMPLETELY still (this will give the best chance of survival) or be in a ufo at the corner of the map (once again not moving).