camille laughs. how do they know where to go and be in the right place? they are smart!nes and this software that we have developed has several layers of security and intelligence. so every single drone is completely ignorant to what it has to do, prior to the show. if it's placed in a specific point on the take—off zone, it knows it's number 312, and if that one's placed somewhere else, that's number 378. but that's their one role and that's all that they do. they take off. they do their show. this show is on every night of the year, weather—dependent. that's a lot of pressure that this tech is under, to be working fully and up in the sky. absolutely, and what was developed for this show was something called hot swap. if a drone has a problem with a motor or a battery or anything that happens, so it'll either come home or it'll literally go straight down. but if it does go straight down, there's a drone that's waiting to take its place. drones are flying 1.50 metres apart. so that drone has to navigate through this sea of drones in the sky, and then parks up and takes o