I SOOOOOO feel your pain! Only less, 'cause it's both my CATS that do things like that - and they weigh a lot less than your boy!! Still, they're always knocking things off (on purpose to get me to pay attention to them) and jumping on everything!
Believe it or not, one day he WILL grow up and you'll MISS the mischief!! (Eventually...)
REmember to take pix!!!