It’s a space problem. If I don’t take that space now someone else would within the next second. Average human behavior. So why not act now? Oh... now i’m standi

It’s a space problem. If I don’t take that space now someone else would within the next second. Average human behavior. So why not act now? Oh... now i’m standing up in a line of people very close to each other. I can smell them even better and now I can’t even sit back because the person next to me took my spot. No one can move and we all look ridiculous :) Similar behavior can be obeserved in a traffic jam