how does runaans work on graves?

i don't think so, but that's a very specific situation. most of the times, the runn will hit the minions BESIDE the main, and they would still be knocked back by his AA.

Edit: after some thinking, i belive runnan wouldn't knock back criters. In my opinion it works like this:

AA -> fire pellets (it's an AA modifier, like sheen or rapidfire, therefore doesn't apply on runn)

pellets: did it hit? yes->knock back no->doesn't do squat

This is also what they teach you at college: divide big problems into smaller ones