A moment to be perfect? That's the weird thing about the word perfect, imo. People say perfection isn't possible (and I'm one of those) but I usually mean that whenever perfect is used to describe an actual tangible object, or to describe a long term thing. Something, say a kiss, can be called perfect, I guess. But in that sense, it also depends on the person. What one person might think have been fine, another might think was full of holes. Strange, huh?
To answer the OP, my last perfect moment would probably have been playing laptag in Battery Park with my best friends. We ended the school year (career) with a bang by wrestling and stuff, it was really fun. =)