Here's an interesting game consistent with the "mea culpa" thread:
After playing 25.Nxf5 I spend a great deal of time analyzing various lines, especially those involving 25...Bg6. After two days of this without making a move, I became impatient and instead of completing my analysis, I logged on because I wanted to play chess. 25...Nf6 was a line I had considered but only slightly because I considered it to be inferior after 26.Qh6 Nh5 27.g4 and didn't expect my opponent to play it.
At the point where I was set to make my 27th move my opponent used his Jedi-like "mind" powers (dark side, of course) to cloud my judgment: somehow I erroneously and instantly became convinced that 27.g4 was a weak move. Instead of stopping to think about this properly, I blitzed out 27.Qg5+? and gave away a won game.
Black's only sensible reply to 27.g4 would be 27...Bg6, but 28.gxh5 Bxf5 29.Qg5+ wins the Black bishop; it then allows Bxe4 and leaves Black in a very bad position.
(1) Chess teaches patience.
(2) Don't play opponents with quasi-magical powers. If you do, and they use them, put a curse on them.