I didn't cross this off my list before because technically they took a mixed martial arts class, not an actual self defense class, so I wasn't sure it counted. That right there should illustrate just how boxed in I felt by the 'life list' rules. The scavenger hunt idea has already paid off in spades.
And, oh hey! This also takes care of item 24 on my Birthday Scavenger Hunt. See what I did there? It's a scavenger hunt WITHIN a scavenger hunt for ultimate Inception-style mind melting potential.