Concerned about your appearance, and your encroaching elephanthood endangering your humanity, you make another effort to stand upright. It takes a lot of effort, but you eventually manage it, although not before you fall flat on your face a few times.
As you become perpendicular with the ground once more, a sloshy gurgling noise emits from your stomach. Your grassy meal seems to be tumbling around in there because of your new position. This shake up splashes digestive juices around, and you feel a pressure.
"Buuuurp!"
A smell of cut grass registers with your trunk, while your whole body feels strange. The feeling intensifies in your forelegs, which become shorter, if not thinner, and human-shaped hands emerge at the end once again, albeit with fingers twice as thick as a regular human.
Another gurgle from your belly, and it bulges out further over your boxers, before toning up somewhat, some of the raw food and fat turning into muscle. Your feet tingle, and extend out slightly, allowing you to balance on them more effectively. You then have the strangest compulsion to sneeze, which you follow through. The sneeze seemingly make your ears pop, and you intinctively feel them. They feel larger than before, as does your trunk. Finally, your hips realign for a shape better suited to standing on two legs, and not unpleasant feeling surges at the base of your spine. You feel behind you and register a small bump inside your boxers, which you conclude to be your new tail.
You dash over to a window to look at the new you. Besides the grey skin and slightly deformed hands and feet, your body wouldn't look out of place at a World's Strongest Man competition, which a large muscular belly. Your trunk now reaches down to your bellybutton, although you lack any tusks, and your ears are approximately halfway between human and elephant. A quick check down the front of your slightly straining boxers shows a not inconsiderate improvement in that area. You are now around six inches taller than your front door, and you can't help but feel this isn't over. Some...*thing* is telling you your tusks have yet to grow in, your ears have to fill out, your tail has only started to grow and you're nowhere near big enough, but that can all be fixed if you have some nice tasty grass. Or maybe peanuts...
"The latex got you too, huh?"