Adam Lind -- who appeared on MTV's "Teen Mom 2" -- was pulled from the mangled wreckage of his Corvette Friday ... just moments before it exploded in flames.
Law enforcement tells us ... Lind was driving his 2001Corvette Z06 really, really fast in Sioux Falls, SD when he collided with a Lincoln Town Car. Cops say the Lincoln was driven by an 87-year-old woman, who had a 94-year-old passenger.
Some VERY good Samaritans saw the crash and ran to the mangled vehicles, pulling everyone out seconds before the Corvette lit up like a torch.
We're told Lind and the elderly couple were taken to a local hospital and treated for non-life-threatening injuries.
Lind is the ex-boyfriend of "Teen Mom 2" star Chelsea Houska. They have a 4-year old daughter, Aubree.