Watch What Happens After Angry Shark Capsizes Man's Kayak

— -- An aggressive shark capsized a man's kayak in Florida in a terrifying moment all caught on video.

Ben Chancey, a U.S. Coast Guard captain for fishing charters, was off the coast of Stuart, Florida, last Thursday, trying to catch a goliath grouper when several bull sharks started swimming around his kayak, he said.

He had a 15-pound bait on his rod and reel, which he let down for the grouper.

The grouper ate the bait, Chancey, 42, told ABC News today, but the fish then started to pull him sideways and pulled the rod right out of his hands.

"Groupers normally swim below the sharks. But this grouper came up through the bull sharks and ate the bait. It was really aggressive," Chancey said, noting that after he went to grab the rod back, the grouper spit the bait out and then the bull shark ate it.

"After the bull shark ate the bait," Chancey said, "that's when it started spinning me around and dragging me all over the ocean."

After about 20 minutes, the shark swam right under his boat and thrashed upwards, tipping the kayak over, Chancey said.

The video of Chancey's encounter was posted to YouTube for a fishing show "Chew On This," for which Chancey is the host.

"I landed on top of where the shark was," Chancey said. "I didn't necessarily freak out."

He said his first thought was to get back on top of the kayak, but quickly realized "it wasn't going to happen."

"My feet were dangling on the side. And after hearing about all the shark attacks ... I figured I had a better chance of swimming to [a support boat] ... than sitting there with my feet dangling over the side."

Less than two weeks into summer, a string of shark attacks have already been reported in North Carolina, South Carolina and Florida.

"With all the sharks around ... you want to get out of the water fast," Chancey said. "You don't know when the sharks will want to come get you."

If "you're in the water with them ... it's like being food," he added.

Chancey, who was wearing a life jacket, quickly swam to the nearby support boat.

"I swam faster than I ever swam before," he said.

When another person at the support boat looked down and saw the shark still attached to the rod in the overturned kayak, Chancey wasn't scared off.

He instead flipped the boat over, jumped back in the kayak and the finished landing the shark.

"He got a good punch. I had to get up off the mat and get another shot. I couldn't let him win that easy," Chancey said.