Tire failure knocks snow off the roof (x-post
/r/dashcamgifs: Dashcam videos in Gif form! - A subreddit for crazy POV gifs shot from any vehicle. this includes gopro, cellphone, drone, and helmet cams as long as they are shot from some kind of vehicle. Be sure to post Gif like format (Gif, Gfycat, etc) We currently do not accept v.reddit posts because of some issues with mobile users. please use Gfycat, Imgur, or other sites. - December 11, 2016 - 18:26
/r/shockwaveporn: Shock Wave Porn - A subreddit dedicated to shockwaves Definition: "region of abrupt change of pressure and density moving as a wave front at or above the velocity of sound, caused by an intense explosion or supersonic flow over a body" - December 11, 2016 - 15:10