No darts are visible sticking in the wall by the floor-lamp in the shot just after the ejecting darts/exploding bulbs sequence.
Ernie Reyes Jr.'s character introduced himself to MacGyver as "Luke Chung" but in the opening credits his name is given as "Luke Chen".
Mr. Chung was on the floor behind a couch, away from the explosion when it blew, yet he has bodily damage that would have only been possible had he been standing up or the explosion was larger. He also has a mark on his head, yet he was face down on the floor when the explosion occurred.
In the aerial shot of the bird cage ejecting the darts, there are no birds in the cage.
When a thug brings his wooden baton down on the hood of a car and Luke karate chops it in half, the half remaining on the car stays there without falling away, and even vibrates with the force of the chop, showing it was set up and anchored to the car for the shot.
After the boy revives his grandfather from his coma, the EKG monitor's pulse-counter graph does not correspond to the old man's more rapid heartbeats.