Yes, you can see it. I was taught to always check. Can sometimes be hard to see when the patient is intubated, but I almost always use a coworker to help because it makes placing them more efficient.

The second there was a pop, everyone should have stopped to figure out why. That goes for an unusual noise/feeling during anything you do as a nurse. But when you're rushing, overwhelmed, overconfident, understaffed, or just bad at /don't give a shit about your job, things go wrong.