Mina isn't really good at dealing with someone having a freakout. She's just about to begin shouting at him to get over it when he runs away to puke. Gross. So gross!

"Hey, don't just go puking in front of people! I don't want to touch your hand either!"

She's too grossed out to bother being polite. Normally she'd be putting on her best appearances upon meeting a person, but this had been a particularly disgusting encounter.