BROCKTON, Mass. (WHDH) -- A driver of an RV was rescued after the vehicle plunged into a family's swimming pool in Brockton Wednesday.

The driver may have had a medical emergency, and was taken to the hospital.

Sky7 HD was above the huge camper after it splashed into a backyard swimming pool.

“I couldn’t imagine what was going on in front of me. If I was 100 feet further up the road, he would have backed right over me,” said Larry Lambert, a witness.

Larry Lambert says he was driving down the street when the whole thing unfolded right in front of him. 

“This camper just came flying out of the driveway in reverse and he crashed into the bushes of the house across the street. And the next thing I knew he put it in drive and came flying back across North Quincy again,” Lambert said. “He went the whole length of his driveway, through his backyard, through a tree, through a fence, and into his neighbor’s pool.”

The neighbor, who owns the pool, didn't want to talk but his daughter says her dad saved the driver's life.

“He said he jumped into the deep end and opened the guy out as quick as he could,” said Elizabeth Little. “The front of the cabin, he said, was underwater. I don’t know if the guy was fully underwater but it was filling up quickly.”

Lambert also rushed over to help the driver who's said to be in his 60s.

“We set him up on the edge of the pool. He said something about the accelerator getting stuck, and then he said something about his shoes getting caught in the accelerator. My suspicion was he was having a medical problem,” said Lambert.

And police agree.

The driver was rushed to the hospital. It took towing crews several hours in a very complicated process to get the 28-foot camper out.

“We've pulled cars and stuff out of a pool, but this is the first time, for myself, for a motor home,” said Sean Bastis, Lynch’s Towing.

The driver was listed in stable condition Thursday afternoon.