John Cena might want to sit alone in a dark room for a while.
On Tuesday's "SmackDown Live," the face of the WWE took a nasty bump off an inverted exploder suplex.
"Big Match John" had Shinsuke Nakamura on his shoulders to attempt a second AA finishing maneuver, but the New Japan Pro Wrestling export elbowed his way out of the fireman's carry.
With all four feet on the mat, Nakamura lifted Cena for a belly-to-back of sorts -- but he didn't quite put the "American Grit" host down the right way.
Cena was instead slammed somewhere between the crown on his head and back of the neck -- hard. He took a few extra moments to get up, with a legitimately concerned-looking referee checking in on the wrestler/actor.
Eventually Cena did make it to his feet, when Nakamura delivered a deadly Kinshasa knee, which resulted in the 1-2-3. The two shook hands later, with Cena raising the WWE newcomer's arm.
Watch the video above -- the scary part comes right around the 2:46 mark.
WWE did not immediately respond to TheWrap's request for comment on Cena's status, (potential) injury-wise.