Lol, I've done that before. It was like midnight, had been gettin down with this girl I had been talkin to for a while. About 15 mins in, I was kinda bored already haha, luckily my phone rang. It was another girl I was talking to at the time.
2nd girl said "Hey, wanna go to taco bell and stop at the bar?" I said yep! Told other girl my friend got a flat tire and had to go help him out, that I'd call her later.
Thankfully, I never talked to her again.
I never answer my phone, ever. Unless I'm actually expecting the call.