there were reports of falling glass, so they broke the window out. Also hearing from MSNBC just now that medics over by the beach of Mandalay Beach (across the bridge thingy)reporting mass casualties
Video from near the stage when the shooting just began:
https://twitter.com/IsabellaCigno/status/914736911847186432
Police scanner reporting people running hysterically on the Aria and Cosmo bridges.