100 Million BC

100 Million BC is a 2008 directtoDVD action film by film studio The Asylum, continuing the urban myth of the Philadelphia Experiment.

Renos team arrives in Laurasia six years after the 1949 team arrived, to find only a few survivors. The SEAL team is illequipped for the dangers of this prehistoric period, and is decimated by a Tyrannosaurus and other prehistoric life.Having accomplished their mission, remnants of the two teams merge into one and return to the present, but in the process the anomaly malfunctions, allowing the subadult, 39footlong 12m, 12foottall 3.7m Tyrannosaurus to travel to the present and wreak havoc in rural Los Angeles. Reno stays behind, ostensibly to close the portal, but instead transports himself to the year 1950 after being cornered by the dinosaur. Apparently he tried to leap through the portal as it closed, but was sent to 1950 instead of 1998. ........

Source: Wikipedia