Spare the rod, spoil the child

[Mystical]

Timeout, Pocaracas, is a forced allotment of time you implement upon your child (a cumulative one minute for every year of their age) where they just go..sit. in timeout. No play, no getting to watch fun stuff, etc. I like putting their timeout in bed because sometimes they act up becaause they're tired and they might just cry themselves to sleep. Lack of stimulation is the wOrst for a kid.

In answer to your scenario, if it were raining and that child kept jumping on the chair, I'd make them sit in the kitchen with me and read me a book or help cook or play with pans or put dishes away (how old is the kid?) Or just sit there and do nothing. That's assuming I couldn't just take the chair away, or set something on the chair. In any case if the kid isn't listening they'd be in the kitchen with me if the timeout didn't work, and if they start throwing tantrums then they can just take their little booties to bed for a nap!
That's the thing about kids--you control their world and they know it. If they don't respect you, they resent you.