[Hiro rubs the back of his neck; he forgets sometimes that Baymax, even with a huge vocabulary on file, is missing certain idioms and colloquial phrases, and he's not really sure how to explain this one when he doesn't understand it himself.]

Messy. Like...confused. [Hiro props his pillow up so he can sit up a little while he explains this.] It's like if you scanned so much data at once, you couldn't process it all right away, and if it was too much you might not be able to process it at all and you'd have to reboot. Like that, except with too many feelings at once, so I couldn't figure out what I felt like. Except that they were all bad feelings.

[He gives a half-hearted laugh.]

Chalk one up for puberty, I guess.