 Additionally, safety concerns caused by 5,000 fans crowding the stage at the 2014 Q&A tour at the Dolphin Mall caused the event to be shut down early.A prominent symbol in Nerdfighter culture is a double-handed gesture with crossed arms, resembling the Vulcan salute from "Star Trek".Celebrities such as actor Benedict Cumberbatch and Olympian Jennifer Pinches have been documented demonstrating Nerdfighter hand gestures.