They're great for improving your speed with a powerball. What they're best for though is just leaving on your desk for blokes to come over and show what weak nancys they are.
The perfect target is one of them lads that we all know, fancies himself a bit, might even be a bit of a hit with the ladies, dresses like a girl. Does the silly scarf throw over thing, uses male skin products, 'goes down the gym' (and spends all the time looking at himself in the mirror), shaves his bollocks. You know the type.
Now wait for him to walk past and spin it up so it makes a noise. Thinking he's actually a man he'll decide to impress you all with his physical prowess. He'll try to play down his eagerness although he'll already be catching the eyes of the girls in the office. 'Watch me show these idiots just who is butch round here. I play football once a week and go down the gym me, I'm about as fit and as strong as a person can be'.
Spin it up for him and put it carefully in his hand.
GAFHAAA LIKE A UPPER CLASS GIMP AS HE THROWS HIS HAND AROUND THE PLACE LIKE A SPACKER AND EVENTUALLY LOSES GRIP ON THE THING AS IT PROVES TOO HARD, EVEN AT 1000RPM FOR HIM TO HOLD ONTO!!!!
I think we did this about 10 times. It never lost its attractiveness.
That's what powerballs are for. Fun ,fun, fun.