ActionScript - loadBytes() example?

Can anyone tell me why you might use loadBytes() instead开发者_C百科 of a simple load()?

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From the ActionScript 3.0 Reference (flash.system.LoaderContext):

When loading a SWF file with the Loader.loadBytes() method, you have the same application domain choice to make as for Loader.load(), but it's not necessary to specify a security domain, because Loader.loadBytes() always places its loaded SWF file into the security domain of the loading SWF file.