Nash said he waited for 20 minutes "just freaking out" about his brother's condition until "I finally got a call like, 'Hey, he's all good. He's just really messed up right now.'"
Hayes' rep updated ET in a statement after he was hospitalized, detailing the 16-year-old former Dancing With the Stars contestant's injuries, including "a concussion, broken rib, bruised lung, and multiple skin lacerations."
"Thankfully, he is OK and currently resting and recovering in the hospital surrounded by his family, where he will remain for the next few days," the statement continued.
On Sunday evening, Hayes shared another update pic on Twitter, showing him standing in front of a bathroom mirror with a bandage around his waist and the consequences of his accident evident in numerous cuts and bruises on his face and shoulders.