House Rule: Fall damage based on mass (size)

Falling Damage is based on mass, requiring a Ref DC 20 save for 1/2 damage.

Size, Damage per 10' fall, Cap:

Fine, 0, --

Diminutive, 1, 10 dam

Tiny, 1d4, 5d4

Small, 1d6, 10d6

Medium, 1d6, 20d6

Large, 1d8, 30d8

Huge, 1d10, 50d10

Gargantuan, 2d10, 100d8

Colossal, 4d10, 200d10

To explain: 

What Happens If We Throw an Elephant From a Skyscraper?