"The Expendables 3" lived down to its title over the weekend as moviegoers shunned the third installment of the shoot-'em-up franchise featuring the action heroes of yesteryear. The movie grossed an estimated $16.2 million, falling short of Lionsgate's projected take of $20 million to $25 million and putting it in the No. 4 spot for the weekend. "The Expendables 3" also trailed the series' previous two movies, which debuted with $34.8 million and $28.8 million, both good for the No. 1 spot. What happened this time around?