character effects

After learning about these different movie clip properties (alpha, xscale, yscale, etc), is there a particular place in your game these will be useful? Please tell me about the parts of your game, for instance, powerups or dead enemies, that will be affected by these new properties you have learned about.

we will be using various properties for different movie clip instances. when a hero hits an enemy there will be a method to take 1 away from the total amount of times(3) that the enemy can be hit before the enemy falls to the ground and its _alpha property becomes = 0. seeming to the player that the hero prevailed over our enemy. when we use powerups that the character picks up i can add different color effects or change the movie clips _yscale ability to symbolize that the character has powered up in real time.