Visible crew/equipment: When Phoenix falls through the glass at the museum into the LA exhibit, you can see him sliding down a safety rope. His feet are even in the position to be sliding down the rope. (00:49:15)
Visible crew/equipment: This is during the firefight in the makeshift restaurant down in the sewer. When John Spartan grabs the table to use as a shield, you can see the cable going with the table that is used to set off the sparks for the bullet contacts. (01:28:45)
Answer: I'm assuming you're referring to when Simon says "Damn, I'm possessed!" He was hacking the machine when he said it, perhaps he'd corrupted the program or shut off the microphone as a side effect?
Grumpy Scot