I don't know much about what happened, as I wasn't paying attention, but I will describe what I did see... I was in a deathmatch game, and someone used portal gun. When it hit a purple bumper, it began to glitch out and continually trailed to the right until out of the screen, like a hoverball, spinning around in the process. If any other info is needed, feel free to ask. I'm rushing this post.
