Infected just came back from the elevator and was already having a bad day, he missed his cat, Poptart, he got insulted by Pest, he got hit by so many snowballs and tomatoes, and then he sees Unpleasant(User) in the bedroom. He just glares at it

"L1tTl3 b4St4Rd.." Infected thought as he stared at Unpleasant