But anyone who has been to school knows what Paul means. When you go to school, a bell rings to notify you when you need to be in class, and you have to be in class before the last bell rings. Once for each class - every day. It doesn't mean no bells sound ever again, but that it's the last call for the class - after that you are tardy. But let's dive into the physics of what Paul speaks of.
Some people like to question how fast the rapture occurs.
In the Greek, the word for moment is atomos or atom. It is if you understand physics and the nature of time. You would think you could take a second and cut it in half, then half again, etc infinitely. But you can't. When you get to a unit of time at 10 -43 seconds, you can't divide it anymore.