You start running from that egg. You don't know what's in it, but you've lost enough of your humanity from this stuff that you'd be fine with never finding out. You do at least manage to get a fair ways away from the thing, but then a pressure in your abdomen forces to stop.
No problem. You're getting a cramp from running. It's fine - you've gotten far enough anyways, you can just sit down and wait it out. However, as you wait the pressure only seems to worsen, and as it does you get a far better sense of the source. It's not a cramp in your abdomen, it's a building pain in your udder. You push at the thing with your hands, and oddly enough you don't feel the sloshing like before. Instead, it feels like the udder's been filled to the brim with whatever's in it. Strangely, it doesn't look like it's stopped filling.
You groan in pain as the pressure grows, the udder's contents stretching it a couple of inches before it's reached the limitsof its elasticity. You try squeezing one of its nipples, try milking yourself, but find that the teets have no holes for the liquid to escape through. Helpless, you can only sit back as the pressure builds higher and higher until
BAM!
The entire latex udder simply explodes. You realize how stupid it was to leave it partly in your pants and just slightly under your shirt as you feel a rush of liquid shooting up your body and down your legs. From the knees down you're unscathed, but above that you're completely coated. Your crotch, thighs, back, everything above your knees and below your shoulders is covered in the stuff. At the same time, the uncovered part of the udder managed to explode outwards, leaving your arms coated from the elbows down in the silky white substance and making a chunk land on your lower face, covering you from your chin to your nose.
You begin to react, but before you can the white stuff on you (apparently latex) starts to wobble as it begins to take on its permanent shape.