After arriving at home, you're eager to try out the potions and see what they do. All the potions you purchased were simply labelled with the word "Potion" followed by a number, so every result would certainly be a surprise. Picking a random bottle, number 167, you pull out the cork and drink it.
The second you drink the potion, your chest begins to ache terribly. You quickly take off your shirt to see what's happening--and are shocked at what you see!
Before drinking the potion, you were slightly overweight, though not obsese. However, looking at your chest, that situation is quickly changing.
All your fat seems to have drained off your body--you're thin as a rail. Watching the transformation, you can see, and feel, yourself bulking up. Your pecs pump up--becoming defined and muscular. At the same time, your biceps bulk up, and you watch as a defined six-pack appears where your gut used to be.
Amazed at this transformation, you decide to try another potion...