As Battalion S-4, I used the "bucket of steam" as a judge of character. If the young soldier laughed it off, I knew he'd be a good soldier. If one showed a pi$$ed off attitude, the soldier was likely to be substandard.
On a limited sample size of about 10, it was a pretty accurate test.
It never hurts to have a sense of humor, whether one is handing it out or on the receiving end.