These two examples illustrate different parts of the same concept of comic relief. The first illustrates it by showing that something unexpected and wrong happened and then is corrected. It results in someone dying (specifically the Hun), but because it is done comically there is no sadness or remorse felt by the audience. Disney makes sure the humor of the accident occurring is in the forefront of our mind, not the death of the Hun soldier. This deflection of the thought of death through humor is a type of euphemistic tactic so children don't have to think about the fact people are dying. The second example is the actual tension breaker which takes the viewer away from the situation at hand through a comic interlude. The situation is very dire, but Mushu very casually decides it's appropriate to make a joke about the fact that the cricket is lucky for being found and saved by him. This type of comic relief that takes the viewer out of the given situation gives viewers a break from the treachery and enables them to laugh even though bad things are still occurring in the scene around them.
For me the character of Mushu is so great because he brings so much to the storyline and serves as a huge importance in the movie by making people laugh even during tragic scenes. I think comedy helps people cope with pain even when they don't realize it. Comic relief is used in movies time and time again because it is proven to evoke feelings of catharsis which is satisfying to the audience. Do you think comic relief is necessary? Do all movies need it in order to be successful?