Magic trouble

[Albert]

I'm assuming your culture has that common Asian seniority culture, seeing that you have to respect the seniors.

In that case, one option is to screw him the heck over using gaffs or gimmicks (or even dupes for example).

Second is to talk with the rest of the group members except him first to discuss how to figure something out. If there is at least one member who is as old or older than that "heckler" (in a sense), you can ask him to tell him off. If not, you've got to just stand up and say as politely as you can "you know what? What you are doing is completely rude and disrespectful. If you are not serious about magic, please leave. You aren't welcome here". Even if he doesn't go away, you've got to make him feel uncomfortable being there.

If you are afraid to do that because he's older, you still need to take your stance. I've been in similar situations and I've even confronted an adult about it a few years back (and my culture is pretty strict about seniority as well). As long as you are polite in the way you speak, there is no legitimate excuse for him to harass you.

You just have to stand up to him like a man. Get your group members to help if you can. Strength in numbers, as they say.