Video by Tsuruke: his phone wouldn't allow him to log-in and post this so I'll post it for him. http://www.youtube.com/watch?v=b7yMxj8noFs Description: Chapter 3 - Unitology Center. Grab a "The Marker" paper weights, and jam it against a wall and you'll hear Halo grenade sounds and Oblivion Sword drop sounds.
