The Rock

Dwayne (The Rock) Johnson has nearly 75 million Instagram followers, and you can bet that at least a few of them were curious about the workout photo he posted Thursday.

As The Rock was working his chest with some dumbbells in the gym of trainer Gunnar Peterson, the squat rack located behind him included a toilet.

So, Rock, what's with the potty in the gym?

Fortunately, he provided an answer in the photo caption: "Gunnar keeps a toilet (non-functioning;) in the rack which a whole other level of psychological bad assery. My old man used to kick my ass so hard in the gym when I was a kid he'd say, "if you're gonna throw up go out side.. and if you're gonna cry then go home to your mother." If only we had this brilliant toilet in the gym idea when I was a kid I'd would've never had to go outside."

Johnson has been a fitness inspiration to many, but maybe envisioning this toilet pic can be another way for someone to get motivated in the gym.