Blowing stuff up never gets old in movies, as the death-defying pranksters from MTV’s reality series “Jackass” proved at the North American box office yesterday.

“Jackass 3D,” the third installment in a feature series about a crew of thrill junkies, crushed forecasts by selling an estimated $50-million worth of tickets during its first three days of release, distributor Paramount Pictures said.

If projections hold up when final data is issued today, the film will beat 2003’s “Scary Movie 3” ($48.1 million) to rank as the biggest October opening of all time.