Two things I have noticed:

1) One of the "option jingles" that we can choose to have as background music on the trainings we create in my instructional design job is a rip-off of U2. It has the same chord sequence and guitar effect of "I Still Haven't Found What I'm Looking For," but played differently.

2) Never let someone else write your curriculum (very ironic considering my daytime job is to write curriculum for other people). They will have a bunch of mistakes that you will then spend hours emailing your students about the corrections.