And it didn't take very long to shake up social media in the worst way possible.

Simpson's account privately messaged a man who runs a parody O.J. Simpson account on Twitter.

The parody account depicts the ex-football star holding a knife and glove — an obvious dig at Simpson's 1994 trial over the murder of his former wife Nicole Brown, and Ron Goldman.

The man behind the parody account quickly uploaded evidence of the exchange in a series of videos, which shows the O.J. Simpson account sending him violent "knife" threats.

"O.J. Simpson just messaged me," the man says, narrating the video as he records the private messages where the exchange happened.