Why do you get naked when you lose it?

You can keep from getting your clothes dirty that way. Also it let's others know you're serious about being off-your-rocker. Monkey see monkey do (others have done that when they're have big tantrums).

Maybe its a side symptom to their neurological/psychological crisis. Maybe during this event they are have a physiological symptom of overheating. Feeling too hot compels them to remove all their clothing. Being in a manic state removes their inhibitions and rationalities regarding the practice of wearing clothes.

Also it's harder to catch a nekkid person...no clothes to grab a hold of.

I always thought people lost it after they got naked

They're just cool like that.

And another thing - why is there such excitement about running around naked?

I remember a friend of mine completing his college career - I was a few years younger along with a few others of us - we were at his on-campus apartment with some of the seniors that had just graduated. This particular friend said - I've always wanted to streak across campus - so of course - I said then why the h*ll don't you?

Next thing you know - he removes his clothing and goes running down the stairs out the building and around the building across the street. When he turned the corner in his full glory, I couldn't help but fall on the floor in tears (agony or laughter I am still not sure to this day) - but why? But why the interest of doing this?

I guess it's catharsis from all living all repressed and such. Or it could be a manic impulse (manic stage) from being afflicted with bipolar depression disorder. Either way, it's an irrational overreaction.