Would this be funny or would it be too mean?

theres this special ed kid in my cl. he is mainstreamed and some of his cles are regular ed (which is how he got into the same cl as me), well he is autistic and flaps his hands, farts, is a close talker, moans, talks awkwardly, and he also gets so frustrated that he has no friends that he cries and complains to everyone, he appears miserable,etc. now i got this idea that i think would be hilarious, but Im worried that it may get me into trouble if i do it because its kind of mean; well he likes this girl named Lauren. i plan to tell him that lauren said she wants to go out with him, then I'll get him to ask her out, but tell him that the proper way to do it is to pick his nose or fart or jerk off in his pants while doing it. Then ill video tape the entire thing and watch her get creeped out and watch him get embarrased and cry (he really likes her, he talks to her alot, its almost obsessive). Then ill tell him that he has no chance with her, and that i just wanted to laugh at him for being a retard , and that he should kill himself because he has nothing to offer the world because hes in special ed and that nobody will ever love or care about him.