oldbloke's mutterings

Somebody out there will know this:
I have some juggling balls. I throw them up something between a foot and two feet. Let's say 25 to 60 cm to keep it modern and SI. One set weighs 130g each, the other 450g each. How many throws do I have to make to use up, say, 1000 calories? Do I use further calories in the catch, to kill the kinetic energy in the ball, or do I actually steal some of that kinetic energy to put into the next throw?

The hills look great.
I love living here.

Goodwood festival of speed.
MUST go one year. Maybe when Jack is old enough to be bold enough to ask famous drivers for autographs, but still young enough that he can use his cuteness to queuejump.

Le Tour.
Armstrong would've had that stage is his foot hadn't come out of the clip! I reckon he can do it, break all the records and win 7 Tours. Might even check the betting exchanges and put some more on.