My guess is he was trying to be accepted socially or get his peers to laugh. He probably saw another kid do it before and got a “good” response from the group. I understand him getting a referral/behavior report for that. Just make sure he’s not getting into trouble for behavior that is clearly part of his ADHD.
Penny
ADDitude Community Moderator, Parenting ADHD Trainer & Author, Mom to teen w/ ADHD, LDs, and autism