Overgrown schoolboys that we are, we always giggle at those erectile-dysfunction-tablet advertisements, where a man with a serious voice intones over soft-focus images of kindly, silver-haired couples, "In the rare event of an erection lasting more than four hours, seek immediate medical help." For one Russian man, however, this disclaimer read like a challenge.

Twenty-eight year old mechanic Sergey Tuganov reportedly accepted a $4,300 bet from two women who claimed he didn't have the stamina to endure an all-day sex session with them. Twelve hours and a whole bottle of Viagra later the dirty deed was done. Unfortunately, so was Mr. Tuganov.

According to Moscow police, the heroic grease monkey thrusted his last mere moments after winning his wager, the victim of a somewhat predictable heart attack. Suggested new health warning: "In the rare event of a Russian all-day Viagra orgy challenge, politely decline."

We think Sergey has definitely earned a place in our badass graves gallery.

Rock N' Roll Spirits

    Rick James The Superfreak's Buffalo, NY headstone bears his own image in tight pants clutching a guitar.

    GG Allin The punk rocker is as subversive in death as he was in life -- his tombstone reads "Live Fast Die" and "Rock N Roll Terrorist."

    Charles Bukowski. The manliest poet to ever live has the epitaph "Don't Try."

    "Dimebag" Darrell Abbot Dimebag's death was tragic and untimely, but his Texas headstone awesomely reads "He came to rock/ And rocked like no other."

    Bob Marley The reggae master was buried with in his own mausoleum in Jamaica with his favorite guitar, a red Fender Stratocaster.

    Bette Davis She wasn't exactly rock n roll, but Bette Davis' epitaph -- "She did it the hard way" -- is pretty badass.

    Billy Wilder The Academy-Award winning motion picture writer, director and producer ("Some Like it Hot," "The Apartment") exited with a joke.

    Karl Marx The founder of modern socialism watches over his final resting place like a stern grandpa, over the inscription "Workers of all lands unite."

    Dee Dee Ramone A founding member of The Ramones, Dee Dee's epitaph -- "O.K. ... I gotta go now" -- is as short and sweet as one of his songs.

    Edgar Allan Poe The headstone at the poet's original burial place reads, "Quoth the Raven, Nevermore."