Lately every evening a bunch of bumblebees circle around my window. I live on the top floor and they seem to be going towards the rooftop, but they regularly bump into the window and it scares me because what if one of them suddenly phases through the window and is stuck inside with me?

I've actually been bumped by lots of wasps and bees in rather funny ways, thankfully with no sting. They are more likely to be aggressive the closer you are to their hive. Otherwise the foragers usually try to avoid confrontation unless challenged.

The most insane one was definitely when I was hanging around a sunflower field where there were hundreds of bees and hornets flying around, but to them I was just another plant with no nectar, so they would just move on.

The other funny one was when I was eating an apple and like 5 bees landed on it while I was biting down on it because apparently they liked the smell and tasted the sugary apple juice on the surface. They seemed unbothered by the fact it was moving around and me not trying to push my luck begrudgingly let them have the rest of the half eaten apple lol.