Rainbows don’t weigh much.

They’re pretty light.

@msbellows @atomicpoet you tag me for THIS
@drskyskull @atomicpoet You're going to tell that joke on Day One of every optical physics class you ever teach, from now until the day you die.
@atomicpoet That's a colorful way of putting it
@atomicpoet yep they‘re super light and produce rain as projectiles instead of an ancient arrow