A real life tragedy has struck the set of the action film The Expendables 2, starring Sylvester Stallone, Bruce Willis and Arnold Schwarzenegger in his comeback role.

A stuntman died while filming an action scene for the movie in Bulgaria, local newspaper The Sofia Echo reported Friday.

The accident happened Thursday when two men were performing a stunt that involved an explosion in a rubber boat. They were on the Ognyanovo reservoir near Elin Pelin, located 15 miles outside the capital, Sofia.

The second stuntman is hospitalized  -- reportedly unconscious -- but in stable condition after undergoing a five-hour operation.

It’s not known what caused the explosion.

Jennifer Aniston's streak of box office bombs continued this weekend with The Switch opening in a desperate 8th place, pulling in only $8.1 million in ticket sales.

PHOTOS: Jen Aniston On The Switch Red Carpet

Aniston was annihilated by The Expendables, that conglomerate of aging action stars including Sylvester Stallone (who also directed), Jet Li, Jason Statham and even Gov. Arnold Schwarzenneger in a cameo. In its second week, The Expendables outdrew Aniston more than 2-1, taking in $17.2 million.

Even vampires (Vampires Suck), lottery winners (Lottery Ticket) and fish (Piranha 3D) had more box office appeal than The Switch, which also stars Jason Bateman.

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A Marley & Me sequel is sounding pretty good right now.

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It's been a busy summer for Randy Couture, between a spot on the cover of UFC magazine, a role in the country's top film The Expendables and a much-anticipated UFC vs. Boxing mega-fight against James “Lights Out” Toney headlining UFC 118 later this month.

We caught up with the 47-year-old Octagon legend and got his take on his whirlwind year, his Expendables castmates and much more from the five-time UFC champ.