Sans is a very dangerous and lethal skeleton just like his brother, Papyrus (over 11 ft tall). Whenever offended, he will either threaten, serious harm, or might even kill the person that pissed him off in the first place. Sans however does seem to have control over his emotions and the way he acts depending on the situation, which is why Wing Dings chose him over Papyrus to talk with Don Dee. Sans is shown to have incredible brute strength, telekinesis, summoning sharp bones, and teleporting.