Dealing With People "More ADHD" Than You

Howdy folks. Longtime lurker, ADHD-C (Unmedicated) coming out of the woods to post.

Was at a meeting recently and the guy next to me was pretty clearly ADHD and unmedicated as well. Drumming his fingers in the middle of the meeting, looking all over the room, cracking jokes in the middle of the boss speaking... I'm no angel myself, but even I wanted to grab him and tell him to knock it off, he was killing my own ability to focus!

Do any of you guys and gals find yourselves irrationally short tempered with other ADHD folks who manifest it differently/more extremely than you? How do you deal?