"but as he noted how both Zimnis and Grommak bumped into someone he stopped to search for another person to do the same, ready to collide with them the moment he found someone suitable. Successful or not, he wondered what was the point of this behaviour but dismissed it as just another oddity of this place..."

At this point I didn't want to straight out write he had hit someone, leaving it for rolls/gm discretion in which independent of the result he would think that. The way it is seems weird ICly, in my opinion.