I can verify that statement. I get extremely impatient, and that lead to the panic. It doesn't help that I am a pretty tense person to begin with. I have a very hard time relaxing no matter what the situation.
@GhostVol your story reminded me of my swim qual for the Navy in boot camp. I could do everything but thread water. When I went through it was the 20ft platform "step off", swim to the side, tread for 2 min, the out to the middle, another 2 min tread, then the other side, and then back under the platform.
Well I got to the first station, and lasted about 15 seconds and that got me a one way ticket to remedial swim class. So I couldn't tread water so they made me do two lapse in the pool to get my swim qual....never made any sense to me.