I was standing outside a hive this evening and watched the bees come and go. I noticed that every so often a bee would come sliding out on its back almost as if it were tossed out. These aren't drones but workers.
There isn't alot of extra activity like robbing, it just looks like the front door of a bar when there's a fight inside. Every so often some one gets the Bum's Rush.
I saw the guards meeting the incoming bees and the normal traffic, but wondered about those few.