Sometimes you don't have any choice but to stop if the entrance way is blocked already.

can be annoying like when i go to Sam's and you have to show your Sam's card before you can go in. I always have mine ready. but some do not. so they make a line of people wait while they fish around trying to find that card blocking the way. seems like they should know to have it ready to show. but no.... they have to find it somewhere in their purse or wallet. if I can get by them I hold up my card and keep on walking.

Yep, they enter the building...stop...and a collision from hell...