For those that don’t know, Icarus and his dad were trapped in a locked room in a maze. His father made them both a pair of wings made of metal and wax. His father warned Icarus not to fly too high or his wings would melt. He also warned Icarus not to fly too low or his wings would rust from the spray of the ocean below. Icarus flew too high and the wax melted. The only times I hear people use it is when they are trying to say they should fly under the radar. I say if you fly too low under the radar, you can’t flap your wings and will crash.