The horror movie trope of unstoppable killers that just keep getting up wasn't started by Friday the 13th's Jason, but he's fairly famous for it - sitting up suddenly, just when everyone think they're safe. So it's unclear whether this is a glitch in Mortal Kombat X or a homage:
Yeah, okay, it's a glitch. I'm pretty sure Jason wasn't quite as good as floating before. But still, hard to kill:
Be interesting to see what happens if you combine this and Mortal Kombat X's Blanche brutalitiesthat turned up this week.