Kaenzig?
Kaenzig is when you're so confused by something you just said, 'Did you even speak English? Let me hear that again and this time try to make sense.'
'You said you're going to run a marathon in socks? Kaenzig. Why?'
'You told your teacher you don't need sleep? Kaenzig. Are you a robot?'
'You said you're gonna eat 10 tacos in one bite? Kaenzig. That's not even possible.'