I felt this way too when I had my first manic episode. I would annoy the hell out of my friends and make them really uncomfortable. I got speeding tickets, ruined my relationship with my best friend of 5 years, and spent 1000 dollars in 2 weeks.

I was beating myself over the stupid things I did while manic but then I started telling myself I really wouldn't have done that stuff if I didn't have this illness. Sure it doesn't excuse my behavior but it does explain it.