Jurassic Panic

You're walking through the mall on your usual weekend trip, headed to meet some friends by the food court. The smell of popcorn and the hum of chatter fill the air, until it's shattered by a deafening roar. You freeze. People are screaming, running past you in a blur. You look. A crazy guy with a gun? Worst. Towering over the atrium, scales glinting under the skylights, a massive dinosaur, something straight out of a sci-fi movie is smashing kiosks and swallowing anything in its path. No, you are not dreaming and you didn't use any funny substance. Your heart pounds. What do you do?