Tombstone
A stone drops from the sky into a rice paddy and then a cross drops on top of it. They've combined to form a tombstone! Wait, does that mean a body fell from the sky first and you just didn't see it?
Imagine seeing a stone and a cross drop from the sky onto each other to form a tombstone right in front of your eyes!
ひ
いしぶみ
None
Now you're curious about what's under there but when you try to touch the tombstone it's radiating with intense heat (ひ)! It must have come from outer space and this heat is from when it entered our atmosphere!
Can you feel the heat radiating off this space tombstone? Maybe there's a space skeleton sizzling under there too...