A hilarious video has emerged of a streaker running onto the field and slipping over during an American high school football game in Portland, Oregon last week.

The footage, captured from the stands, shows the masked streaker running purposefully in his underpants across the full length of the pitch before tripping just as he is about to exit the ground.

The man then performs a melodramatic vaulting manoeuvre over the fence surrounding the stadium and runs off.

The amusing scene prompted howls of laughter from the spectators in attendance.

The match saw home team Tigard High School wrap up the Three Rivers League championship against local rivals Tualatin.

A hilarious video has emerged of a streaker running onto the field and slipping over during an American high school football game in Portland, Oregon last week.

The footage, captured from the stands, shows the masked streaker running purposefully in his underpants across the full length of the pitch before tripping just as he is about to exit the ground.

The man then performs a melodramatic vaulting manoeuvre over the fence surrounding the stadium and runs off.

The amusing scene prompted howls of laughter from the spectators in attendance.

The match saw home team Tigard High School wrap up the Three Rivers League championship against local rivals Tualatin.