You watched as your room mate's face has been transformed, he feels at it, and attempts to speak to you, though now he lacks a mouth, so no way for him to form words anymore
Whenever he tries to speak or say something all he can do is flare is nostrils. the more he tries to yell the larger they get, but he cant speak at all

You hear him sniff loudly and as he tries to talk to no avail
such a huge nose he has now less