Continuity mistake: When Goat dies, after the last attempt at defibrillation is made and the others give up, you can see the supposedly "dead" Goat take a big breath just before Reaper says "He's gone". In addition, in this shot Goat's eyes are wide open when the camera is on him. When the shot goes from Reaper back to Goat, his eyes are now closed.
Continuity mistake: When the Sarge wraps the wire around his arm, it coils down his forearm once, like a spring, with just enough to wrap around his hand and make the spike. In the next shots of him, the wire criss-crosses the Sarge's forearm, indicating a longer wire was used during the "fighting." Also, the wire sits comfortably around his arm, when in actuality it should grip the forearm hard enough to leave marks and cut off the blood circulation to the hand, with only the ends of the wire relaxing.