I have six kitties, so you can imagine how it is when they all get bursts of energy at different times. I was told that cats sleep 19 hours a day and when they go into this energy kick, it's because they are indoor cats and need exercise, a stress reliever if you will. I find that my cats usually get pretty rambunctious right after they eat and visit the litter box. Sandie is also right in saying that you might want to check for fleas, earmites or anthing that might cause them to react that way. I have a 6 year old tortie, Mollie Rose, who is usually a permanent fixture on the kitty gym. All of a sudden she'll get frisky. It only lasts about 10 minutes then she's back to sleep. So, who knows? If one of my cats gets real crazy and starts to stress out my older male (which usually happens) I do a kitty timeout or "kitty jail". It works. But unless your kitty is aggressive towards another cat in your house it's best to let them run it out.