Visible crew/equipment: When Matrix is holding Sully over the cliff, you can see the cable holding him up. (00:40:51)
Visible crew/equipment: In the scene where John uses a Caterpillar to enter the scuba and guns shop, the driver is a stuntman, in both slow or normal motion. (00:51:45)
Visible crew/equipment: When Matrix and the girl are driving out of the parking lot you can see the camara crew in the reflection of the car. (00:29:54)
Visible crew/equipment: In the beginning of the movie where the 2 men murder the guy in his robe, just after they finish firing in the background you can see a man just standing there to the left of the screen behind some trees. (00:02:00)
Visible crew/equipment: In a scene towards the end, you can see the two bad guys flip into the air, and see the air ramps they fly off. (01:13:24)
Visible crew/equipment: When Arnold is crashing into the gun shop in the caterpillar you can see the camera to the rear (a black round one) and then also the camera at the front can be seen as a yellow box, attempting to be disguised as part of the engine block. These quickly disappear in subsequent shots. (00:51:40)
Answer: They didn't know where Matrix lived. They were killing Matrix's old unit because they knew if they did General Kirby would make physical contact with Matrix to warn him. They simply followed Kirby to Matrix's home.
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