A rearview mirror cocks to check out whatever it is Knock Out sees behind him, and a second later his engine revs to send him in a quick arc to see it more directly. Huh. He can't place them, whatever they are. He hasn't seen too much of the non-sentient life on this planet though, so that's not all that surprising.

"Huh. You recognize them?" More mildly curious than anything else. They're probably interesting, but he's more eager to keep driving.