Shocking footage appears to show tell-tale movements under a blanket on his lap inches away from a woman reclining on a chair.
A stunned passenger points his phone camera at the man’s face while laughing at him.
The soberly dressed passenger, sporting what looks like a business suit, shirt and glasses, turns to look at the camera.
Looking uncomfortable he starts squirming in chair before mulling over his mobile phone in his other hand.
Meanwhile while the guy filming continues to giggle.
The video is reported to have been filmed in Brazil in February.
But the man shooting the footage talks in German and then Russian.
One LiveLeak viewer, where the video was posted, Drwyte concluded: “And that’s why you never use their blankets.”