Fireballs are always fascinating to watch. Check out the International Meteor Organization website to read up on the latest sightings of fireballs over various parts of the world. Most objects that create the fireballs are large enough to generate an observable impact flash on the Moon. So whether a shower is active or not, there is always the potential to witness a meteoroid impact flash on the dark (shadowed) section of the waxing or waning crescent Moon.