flick, jolt, twitch, yank, tug, dork, hitch, flip, buck, rate of acceleration, more...

nice, kind, considerate, thoughtful

sudden, knee, quick, little, such, sharp, violent, real, slight, big, upward

annoying person,   sudden movement,   mean person,   move suddenly,   turn head quickly,   nasty person,   a mean person,   rude dude,   obnoxious person,   unpleasant guy,   a rude person