Awwal 27, 1432 H/March 2, 2011, SPA -- It turned out to be an all-nighter, but not the fun kind. Seven high-powered traders and brokers who went out for a night on the town in London's Canary Wharf business district ended up curled up together on the floor of an elevator after it malfunctioned and their calls for help went unheeded, according to AP. An investigation is under way to determine the cause of the elevator failure, but some news reports have speculated that the group was jumping up and down inside the elevator, causing it to stop working. Building employees found the seven traders and brokers asleep on the elevator floor at 3 a.m. Friday. The seven had been eating sushi and drinking at a Japanese restaurant in the Canary Wharf business district before they became trapped.