Distortus rex

you and your friends in the yk era, you all fell to a manhole, it's dark, you couldn't even see each other, but one of your friends pull out a flashlight, allowing everyone to see, but the light triggers the D-rex, which appears behind the friend who has the flash light without even them knowing, then you yell You: BEHIND YOU! he then turns around and sees it, the D-rex then attacks him, killing him, you all they run away, it then catches up to you guys, what do you do