Originally Posted by
bknight
I know, I've finished my daily glass of red wine(whine) and no one brought me any cheese. bah humbug
Humbugs are solid, so throwing one will generate a propulsive force. Tantrums are abstract, so neither solid nor fluid. There's scope for a valuable experiment here. Try throwing a tantrum, and if it flings you backwards across the room then you'll know that abstract concepts have some of the attributes of a solid.
Dave