The context of the following conversation is Quinn was in a hurry to get to work and forgot if he had locked the door so he had to go back to double check.:
Quinn says I think I forgot to lock the door..
The friend responds I saw you put the key in the lock..
Quinn responds Are you sure?.
The friend responds You've been really forgetful lately..
Quinn responds Now I'm going be late for work..
The friend responds I'll double check it for you..