Twenty-two-year-old Darryl See was hit by the Chicago-bound train as he walked along the tracks east of Michigan City on Friday.
He has several broken bones but has already been upgraded to stable condition.
See told police he had headphones on and did not hear the train's whistle as it approached behind him.
"He doesn't remember. We have to go with what he says. Didn't remember even walking on the tracks let alone getting hit," said Helen Hugley, See's grandmother.
Police estimate the train was going 110 miles per hour when it hit See.
