Humans are much more resilient than monsters, that is true! But humans, unlike ghosts, can also experience pain when striking objects.

[And what is a bruise, if not a strike from an object? He's onto you, Blooky. And he notices the look that Napstablook gives the kit too, though at the moment Mettaton's distracted pulling out some antiseptic and bandages.

To his credit, he does listen, even as he uncaps the antiseptic spray.]

I don't understand quite how we got here either! But it's easier to assimilate than be too worried, you know? Whatever this is, it can't last forever, right? We will get home, at least, that is what I believe!!

Close your eyes, sweetheart. This may sting just a little.