One of the most satisfactory feelings when training is to get a particularly difficult workout done to the details prescribed by the coach. It has happened to me several times, particularly close to race days when intensities go up in every sport and sometimes the body is under some strain. Two particular sets are usually troublesome to me but I've tamed them both on my last campaign so hopefully I'll know how to play them when the time comes.
The second workout I can't get to do well is a set of 200's on the pool on a given time that allows for little more than 3 seconds rest. This one I managed to get around on the second attempt and the third, but the last time I failed again, a bit demoralizing but nothing to make a big fuzz.