When Lindsay is flipping through photos of cheerleaders and comes across Paula's, she flips it down onto the scanner. As she does, the light shining through the photo makes it clear to see that the it is a different picture (with a woman wearing sunglasses) than the one we've just seen close up. When the scanned photo appears next to "plus sized Paula" on the computer screen, it is back to the original.
When the paramedics try to shock the victim on the basketball court, they apply the paddles while his shirt is still on. For the treatment to do any good, the paddles must be applied directly to the skin. Furthermore, using a defibrillator on cloth could cause fire and burning.
The bad guy's taxi lights up "On Duty" when he is ready to pick up a customer, and his hack number stays illuminated. Real New York City taxis light up "Off Duty" when not available, and the hack number extinguishes when the flag is dropped.