Jimmy Graham is VERY fortunate to be alive today ... the NFL star told reporters he was going NINETY MPH before flipping his car in that terrifying rollover March accident.
Graham walked away from the wreck in the Miami area unscathed ... but when he broke it all down for media members at his press conference Tuesday, it's truly hard to fathom how he wasn't seriously injured in the crash.
The 33-year-old says it all initially happened because he saw a cop car going down an off-ramp with its reverse lights on.
"He was reversing," the Chicago Bears tight end said.