person A: Oh great. There was a big spider in my room_comma_ so I went to get something to scoop him up with (or flatten_comma_ I hadn't decided between the two yet). I come back and he's disappeared. 
person B: oh oh_comma_ so now you don't know where your enemy is hiding.  Sounds scary.
person A: It's scary and annoying because now I have to systematically check every inch of my room because I'm definitely not sleeping here with that big ol spider somewhere in my room!
person B: How annoying_comma_ but would be wise imagine it jumping on you while you sleep.