Time Traveller

You are a one-way time traveller. That is you're smart enough to travel back in time but not back to the present. Pity since you arrived about 5 minutes before the planet killer dinosaur reaper asteroid is about to hit Earth. Chat to the asteroid, have a selfie with Mr T Rex or pray to Talkie God. Who cares. You've got 4 minutes and 45 seconds left to live.