Is this Jameson's toxic twin???
Jameson has recently been completely hyperactive, but I am suspecting it was frustration at the bad weather, because for 2 days now he has been a (hyperactive) but exitable little puppy going absolutely mental everywhere (inside/outside) and over everything.
We spent 5 hours in the garden yesterday (well, I was doing gardening/trying to plant seeds and he was distracting me, knocking pots over and digging up the seeds again). He was climbing anything that could be climbed (incl neighbours old broken fence he got stuck in and needed rescuing from). He spent ages sitting on top of the shed roof, like he was the king of the world and everytime anyone tried getting up on the roof he'd come running towards us whacking us in the head.
Also recently while being indoors, he's been charging around like possessed by the devil, wanting to play every minute of the day, hiding behind the curtains to jump out and attach himself on my legs when I walk past.
I personally think it is down to personality aswell as weather/boredom (in my case anyway, J gets bored when it rains so he'll terrorize us indoors instead). Jameson will be 2 years (on Friday) and I put it down to him being young and still extremely playful. I think some cats are just more playful than others. (a friend of mine has a young cat that just wants to be lazy all the time)