i was hitting casually with my friend when he hit a forehand that completely caught me off guard. As it was coming towards me it seemed like it was going to my forehand side, but then it spun to my left and i was going to hit it with a backhand. However, it then seemed to spin right, and i didn't have enough time to set up a shot. When i asked him about it later he said he just hit it really hard, and didn't even think it was going to stay in at the time because he didn't hit it with the sweetspot. He said it was kind of like a knuckleball. My question is how do you hit this crazy shot, and is there a name for it?