Not only did Warner Bros.' The Hangover Part II score the best opening of all time for a comedy at the domestic box office, it grossed the most of any R-rated film in its first five days.

"Hangover," debuting last Thursday on the eve of the long Memorial Day weekend, earned $137.4 million through Monday. That beats the $134.3 million earned by Warner's "The Matrix Reloaded" in its first five days.

The movie's performance marks a milestone for Hollywood, proving that comedies can become summer event pics, and do as well as superhero franchises. In addition to breaking several key records, "Hangover" also nabbed the fourth-best opening ever for Memorial Day.