I remember during the team tryouts on TUF 3 all the fighters were wondering why the **** Shamrock was having them lift sandbags.
The same goes for, say, Ken Shamrock's Lion's Den test. If you look at that and say, "wow, someone who can do that is a badass!" and then replicate the *test* as your *training*, then you've gone terribly wrong. The training should not be the test. The training should not be specific to the test. The training should make you good at all things, or all the things that matter, which will include the test. If you just do the Lion's Den workout five times a week, then congratulations you're good at that workout but you missed out on maximally improving the attributes that the test is intended to measure. A rational strength and conditioning program would achieve better results than aping the test itself.