Despite a very tight filming schedule for Me and Orson Welles, Zac took some time out to stop by and say hello to Connor Steventon, a little boy who was very sick with cancer. Connor was a huge HSM fan and his mom got him the ultimate 13th birthday present, a visit from his idol Zac. Judging by the picture, Zac taught Connor one of his signature photo op moves, the shaka sign. The pic is from March 1 and a couple of weeks later Connor passed away.
Full story about Connor at the source.