Man caught setting world record for unexpectedly surfing world's largest wave (video)

Garrett McNamara surfing on 100-foot wave 
By: Tanya Malhotra 

(Scroll down for video) A man was seen on video hitting a world record by successfully riding the largest wave ever surfed, according to a video uploaded to the Internet.

A professional Hawaiian surfer probably broke his own world record by riding the impressive wave off the coast of Portugal, believed to be over 100 feet high.

Garrett McNamara surfed the extraordinary wave on Monday, off the coast of Nazare, about 75 miles north of Lisbon.

Video captured the amazing event how McNamara, 45, rode up a series of waves that rose in the choppy blue waters before climbing to the top of a particular huge wave.

McNamara is seen on top of the huge wave before falling into the sea.

His feat is believed to have set the new world record for the tallest wave ever surfed. If this proves to be the case, McNamara will have broken his own record, previously established by him, of 78 feet.

Guinness World Records officials will begin its verification process shortly. After his epic achievement, the pro surfer took to Twitter to thank all his fans.

"Thanks for all your support. This means the world to me. Today was an amazing day and great fun to be there," McNamara wrote.