Granted. Your body convulses and you collapse on the ground. Getting up, you feel amazing. Every muscle in your body is pumped up and you feel like you could run a marathon, and make it 1.5 miles instead of 1 mile before being out of breath. You think to yourself, I've got the perfect wish, no downsides whatsoever.

But then you feel your body convulse again, it's not so bad this time. What was that? You feel stronger still, even your eyelids seem lighter. 50% stronger again? Cool by me. Then you feel a rush over you body again and barely feel it, like a slight tension washing over you before disappearing once more. It happens again and again. Always 50% stronger. Your arms and legs are like the wings of butterflies now, they move effortlessly through the air.

You feel a bit parched and try to pick up a glass of water, but it breaks in your superhuman grip. You try to pick up something else, and it flies through the wall, so loud that it hurts your ears. You're still getting stronger by the second... always 50% stronger despite your still average looks.