Exit Speed (2008)

An act of kindness gets a busload of travelers into a world of trouble when they stop to check on an injured biker and incur the wrath of his psychotic fellow gang members. It's Christmas Eve in Texas: ten passengers board a bus in hopes of getting home for the holiday, but find their journey delayed after their bus strikes a biker and the driver pulls over to ensure he's alright. But this isn't your average biker; he's all hopped up on crystal meth and armed to the teeth as well. Upon regaining consciousness, the drug-frenzied biker opens fire on the bus. Terrified, the passengers somehow manage to gain the upper hand and kill their trigger-happy assailant. Unfortunately for the passengers, this is only the beginning of their Christmas nightmare. The rest of the gang has witnessed the lynching, and now they're determined to avenge the death of their brother by killing everyone responsible. After forcing the boss off of the road and into an abandoned wrecking yard, the gang surrounds the stranded passengers and prepares to move in. But while this gang of renegade bikers may excel in the area of brutality, their intended victims are even more cunning when it comes to utilizing every resource at their disposal to wage a life or death struggle for survival.