Umm .... something strange is going on with James Franco

The actor has been sharing some pretty interesting photos on his Instagram page lately -- but the one he posted on Thursday night might be the most revealing yet.

Visibly sweaty, James is seen sporting nothing but a pair of low-riding white boxer-briefs, with his hand suggestively covering his privates. "JUMP ROPE" he commented on the photo, explaining why he's so sweaty.

He shared a similar photo in bed just last week, as well as another pic of him snuggling with "Pretty Little Liars" star Keegan Allen.

The photos come in the wake of his mini Instragram scandal last month, where he was caught using the social networking app to hit on a 17-year-old girl.

What do you think of his latest snap? Take it away, Alyssa Milano!