Me: *opens blinds on patio door*
Neighbour’s cat:
Me:
Cat:

Me: *a few second later* Hello!
Cat: Meow?

Maggie (curled up on the sofa): *finally notices the cat, glares accusingly at it*
Me: *starts to unlock door*
Cat: *runs off back to its house*
Maggie (belatedly): *growls*