Russian roulette with the balance

It makes it to the balance displays the result.
It has remained unchanged for some currently back on it, weighing shows a different result.

Thus, each gear can be used to scale either shouting for joy or out despondent. And within minutes.

But has the advantage that if the result is a not so happy, just as long as it is repeatedly until the result fits nearly ^^

Seriously, I think the scale for very inaccurate.
Because it fits visually but wonderfully into the bathroom and I do not weigh as accurately take it with, she is allowed to stay.