Rather Tom Sawyer-esque.
One day Tom was in the act of dosing the crack when his aunt's yellow cat came along, purring, eying the teaspoon avariciously, and begging for a taste. Tom said:

"Don't ask for it unless you want it, Peter."

But Peter signified that he did want it.

"You better make sure."

Peter was sure.

"Now you've asked for it, and I'll give it to you, because there ain't anything mean about me; but if you find you don't like it, you mustn't blame anybody but your own self."

Peter was agreeable. So Tom pried his mouth open and poured down the Pain-killer. Peter sprang a couple of yards in the air, and then delivered a war-whoop and set off round and round the room, banging against furniture, upsetting flower-pots, and making general havoc. Next he rose on his hind feet and pranced around, in a frenzy of enjoyment, with his head over his shoulder and his voice proclaiming his unappeasable happiness. Then he went tearing around the house again spreading chaos and destruction in his path. Aunt Polly entered in time to see him throw a few double summersets, deliver a final mighty hurrah, and sail through the open window, carrying the rest of the flower-pots with him. The old lady stood petrified with astonishment, peering over her glasses; Tom lay on the floor expiring with laughter.
( The Resident Loon Not a demographic. Do not measure., Tue 1 Apr 2008, 18:43, Reply)