You head into the dinosaur room, and make sure none of the skeletons of them are removed from display. Luckily, the skeletons were untouched, but what you didn't read is the sign on the door before coming in that said "Do Not Come In After 10:00 P.M". You obviously didn't know what would happen by that time.
Out of curiousity, you took a look at the clock on the wall, and found that it was 10:00 P.M, already meaning that something was about to happen by that time. All of a sudden, you felt the ground shaking, meaning that one of the dinosaur skeletons must have moved. You point your flashlight, and find that all of the dinosaur skeletons were moving, while also growing organs, blood, and even skin while regaining their senses. Just then, one of them started to notice you as a portal opened.