When the dome lands, it slices a cow in half, which slumps to the ground, sliding on the dome's surface. It leaves no blood behind on the dome's surface, yet when Dale (Mike Vogel) touches it with his blood-covered hand, it leaves a bloody handprint behind. The cow should have left behind blood as well.
The wristwatch on Barbie (Mike Vogel)'s right hand switches several times between a Casio G-Shock and a generic black rubber watch.
In the script, people keep saying that the dome descended, fell, dropped, and/or crashed over Chester Mills. But if one watches the sequences where the dome appears, the damage moves up from below ground. The dirt and debris are thrown into the air, the blood from the sliced cow sprays up, and branches are tossed skyward.