Nocturama (2016)

 A thriller about a group of young French terrorists who hole up in an expensive department store after committing their attacks.

From there, it turns into a kind of Dawn of the Dead-type commentary on consumerism and self-destruction, as the young terrorists grow restless and bored as the night drags on, engaging in increasingly stupid and reckless behavior that will eventually lead to their downfall. They turn the department store into their playground, blasting music on the stereo system, dressing up in the expensive clothing, playing with the toys, and raiding the kitchen for their own little feast, like Charlie Chaplin and Paulette Goddard in Modern Times.

The story is slow to get going -- a lot of time is spent building up to the acts of terror, but these seem almost secondary once the real story takes over: how could these young people, capable of pulling off such carefully-plotted catastrophic destruction, also be so incredibly stupid and careless in the aftermath.