Funnyman JACK BLACK saw the serious side to filming when he sliced open the skin around his eye when a stunt on the set of new Mexican wrestling comedy NACHO LIBRE backfired.

Filming of the KING KONG star's new film was stalled while the actor recovered from his tumble - and now he has a scar for life.

He says, "I dived... and fell on some people and I hit a chair. Busted my eye... I got a nice little three-day vacation. Scarred for life."