GQ! lol, I always wanted to know that also.
I’m “assuming” depending on what ELSE you suck in, the bug/s might get CRUSHED!!! and or Dismembered!!!
If it’s an ANT, my guess is that it WILL be able to find it’s way out. (ants rule)
maybe even a Fly and or a spider.
I think if you buy a Dyson you should be ok (I don’t own one, but I’ve heard so many good things about it) also with a Dyson they’ll be too dizzy to walk/crawl straight :P
If your vacuum is the kind with a spinning brush thingy at one end, I’m assuming the insects will just Die right there.