Fun with spells, fun with potions..
Many years ago now, I was playing a one shot with a friend of mine.  The character was a pyromanic, chaotic neutral, cleric of a god of fire.
He cast fire trap on the local mayors door, then knocked, then ran.
Not quite the same, but we also pioneered the use of animal testing in a D&D game.  the 2nd edition DMG stated that an identify spell cost about 1000 gp.  He did not have that kind of money, but he did live in a rat infested shack.  So we decided that a minor taste would give an idea of what a potion did without using all of it.
Potiion of super heroism + rat meant that hilarity ensued.  Same with a potion of growth, which caused a godzilla rat.  This resulted in a lynch mob coming for him.
He also used a potion of invulnerability, and started doing pushups.  He was hanged by a noose, and let him self off.  The townsfolk left him alone after that.
END COMMUNICATION