Armed with a MacGyver-style lure made out of a wrench, string and two hooks, Ryan Hein of St. Petersburg, Florida, knew he would catch something while fishing. But he never expected to return home with a 400-pound Goliath grouper.

Stationed about 30 miles offshore, Hein and two friends captured the crazy moment on a GoPro camera, according to KFVS12. The video shows the pole nearly bent in half as Hein struggles with the hefty fish.

<img class="styles__noscript__2rw2y" src="https://dsx.weather.com//util/image/w/goliathgrouper.jpg?v=at&w=485&h=273&api=7db9fe61-7414-47b5-9871-e17d87b8b6a0" srcset="https://dsx.weather.com//util/image/w/goliathgrouper.jpg?v=at&w=485&h=273&api=7db9fe61-7414-47b5-9871-e17d87b8b6a0 400w, https://dsx.weather.com//util/image/w/goliathgrouper.jpg?v=ap&w=980&h=551&api=7db9fe61-7414-47b5-9871-e17d87b8b6a0 800w" > Ryan Hein of St. Petersburg, Florida, poses with the 400-pound Goliath grouper he caught using a wrench, string and two hooks. (Screenshot via CBS Miami ) (Screenshot via CBS Miami )

“It was the first drop and the third pull before the fish came up and took the jig,” Heinz told WFTS-TV. “I knew it was a huge fish immediately. I had no control, just holding on while the fish just went wherever it wanted to go. I couldn’t believe the gear held up and we landed the fish.”

Goliath grouper, or Epinephelus itajara , are large, solitary fish that can grow more than 8 feet long and up to 800 pounds, according to the Florida Museum of Natural History. The fish have been long prized by sport and recreational fishers.

(MORE: Florida Man Opens Front Door to Find 9-Foot-Long Gator)

Though he was stunned by the size of the fish, Hein was even more surprised that his lure, which he initially posted on Facebook as something of a joke, actually came in handy.

“A lot of mechanics know that you don’t really use an 11 for anything. At least I never have,” said Hein, referring to the No. 11 wrench he used. “Some jigs can cost $20. I was just looking for a way to make a jig without spending so much money.”

Though he got a pretty decent sized cut while trying to remove his wrench from his catch, Hein plans on going even bigger with his next homemade jig, according to WFTS. He plans to try a No. 14 wrench and other household items, including a fork and butter knife.

MORE ON WEATHER.COM: Mola Mola Sunfish