Mayday, mayday, mayday! It turns out that the convention of saying "mayday" as a radio signal of distress originated in the UK in the 1920s. From Wikipedia: "If a mayday call cannot be sent because a radio is not available, a variety of other distress signals and calls for help can be used." Common alternatives are setting one's plane on fire; crashing it into something on the ground; or bailing out, hitchhiking to the nearest emergency services provider, asking for assistance, and then being catapulted back up into the plane.
Join us in the park for May Day festivities which probably won't include a dance around a maypole, or any other pagan shenanigans. If there were a maypole we would surely arrange for a flaming, pilotless aircraft to crash into it. There will almost certainly be a puzzle that's in need of being solved.