Facebook ambush
You lie in wait on Facebook like a spider in a web until your prey shows up in green, and then you zap them with a message, comment, or tag like they're on fire.
You posted about your boring weekend. I tagged you before you even finished your post.
I sent you a message right when you logged on. You had no idea what was coming.
You commented on my post. I replied so fast you couldn't catch your breath.