Four Lions

Four Lions, a British comedy film following four radicalised young muslims, two of whom go off to Pakistan to terrorist training camp, accidentally killing fellow jihadists by misfiring a rocket, aiming at a drone in the sky, but firing it backwards to camp.
Barry wants to bomb the mosque, to promt a fight back from the muslims. The group's misfortunes continue when Hassan allows neighbour into their house, where they have been making improvised explosive devices. Thinking they have been compromised, they relocate their explosives in carrier bags, when Faisal trips in a field, in turn, unintentionally blowing himself up. Their final mission was to bomb the London marathon. They donned their costumes and strapped up their suicide vests. Police attempt to shoot Omar, but mistakingly shoot an innocent rookie in confusion. Waj runs into a kebab shop, taking anyone inside hostage, and when the police finally enter, they shoot one of the hostages, sending Omar into confusion and blowing himself up.