

Actor, personal trainer, and model Greg Plitt, who was struck and killed by a Metrolink train on Saturday (Photo by Alberto E. Rodriguez/Getty Images)

Reality TV star and fitness guru Greg Plitt didn't just trip and fall in front of a Metrolink train that fatally struck him over the weekend. He apparently tried to outrun it—pretending to be as fast as Superman—for an energy drink commercial he was shooting.

According to TMZ's sources, law enforcement reviewed the video of Plitt on the train tracks in Burbank on Saturday. They say in the video that Plitt is standing on the tracks, and as the train is speeding towards him, he "assumes a runners stance and bolts down the track." Plitt is running down the track but he can't outrun the train, and in the clip, it shows the train hitting him and Plitt getting thrown off the track.

One witness who worked on the commercial shoot told an investigator that Plitt was trying to show that the energy drink would make you as fast as Superman and be able to outrun a train, a source told TMZ. Warren Coulter, friend of Plitt's, told the L.A. Times that he had heard from film crew members that it was a stunt that meant to be a play on Superman being "more powerful than a locomotive!"

Authorities also found empty bottles of the energy drink near the train tracks, and believe that Plitt may have been been wired on caffeine before the shoot.

Previously, witnesses said that Plitt, who was wearing all black that day and holding a camcorder in his hand, had just tripped and fell trying to get an action shot for the commercial. Plitt and his crew didn't have permission from Metrolink to film on or near the tracks.

Plitt hailed from Maryland and was a West Point graduate. Before becoming an actor, personal trainer and fitness model, he was an Army Ranger. In 2008, he was cast on Bravo's reality TV series Work Out. He had most recently appeared on Bravo's Friend to Lovers, which premiered last Monday.