I'm trying to teach the concept of excuse me to someone. "If you bump into someone say excuse me." I'm having a little trouble with this. We use more of pidgeon sign...so should I sign bumps into someone...a sign for each word? I can't find a sign for bump, I wa sthinking push but it's not really intential. Or would I use classifiers and some how express the concept of bumping into someone. How would I do that? any help would be appreciated. Thanks!