Nice makes me wanna go spin the wheel. Really keeps things in perspective about positive expectancy and positive outcome bias.
http://www.socr.ucla.edu/htmls/SOCR_Experiments.html Go to roulette experiment and knock yourself out. (set it on double play button update 1 and 1000 trials, watch the distribution unfold).
Let's don't forget that market returns are not a bell shaped curve. So the magnitude of your losses will tend to be larger, well unless of course you are "special".