You also don't notice that your getting furry. But the berries taste so good and your so hungry that you keep plucking berry after berry after berry off the bush and popping them into your mouth.
You're enjoying the fruit so much that you are only vaguely aware that the strange feeling that you had has gone. In fact you feel wonderful. So wonderful that you don't even mind that the bush keeps getting taller and taller before you. Plucking off several berries, you take a look around and see that everything is much bigger now. "Hmmm, I seem to be shrinking," you think to yourself. With a shrug, you turn your attention back to the bush and getting some of those delicious berries.
Your shrug causes your now oversized clothes to drop to the ground. You've shrunk down to half your original height and you're still getting smaller. Soft, silky brown fur covers you, and you've got a long sleek tail. You continue to eat and continue to shrink.
Finally, your hunger satisfied at last you step back from the bush and let out a tiny little belch. You chuckle at how odd it sounds and then stop, your eyes wide at how squeaky your chuckle is. Now that you've finished your "mousey" meal, your head cleared of the magic that kept you eating, you're shocked at what's happened to you.
As you twist your head from side to side to try and see what you look like as a mouse, you soon realize that you've still got many human traits. Your paws are still very hand like, and your still able to stand on your two feet.
Just as you are about to see if you can still talk a tiny, squeaky voice calls out to you. "Well, looks like I'm not the only one who's been caught by this mouse trap." A light tan colored, and obviously male, mouse steps out from under the bush and walks up to you.