What barriers cause you to procrastinate?

Well if all your workers go on strike or you die or you get blown up or so on

The sound barrier is something of a myth that dates to the early days of transonic flight. As early airplanes approached the speed of sound, they suffered various flight instabilities--a significant...

Breaking the "sound barrier" causes a shock wave in the air that may be perceived by those on the ground as a sonic boom.

When the sound barrier is broken, a sonic boom occurs. This is a sound wave that is actually fairly potent and it can and has in the past harmed structures or people nearby. If the object is large...

Procrastinate means to put something off until later. An example is " I will do that later."