Maybe they just smelled what he was cooking.
To be fair, he only goes by Dwayne Johnson now. So by that logic he won't turn into a rock he'll turn into a... oh god no
He obviously smelled what Obama was cookin'.
Even the nicest of Christmas photos isn't free from the threat of getting ROCKED.
The very next scene is him giving the Rock Bottom to Professor Oak.
The old guy is checking to make sure that's not The Rock in front of him.
Never thought the Rock was like that...