Software changes over time (both the browser, and the flash plugin, and the flash code deployed on web pages) so asking someone to reference a particular site that will crash your particular browser won't help you understand what's going on. A better idea might be a few clever search strings:
http://lmgtfy.com/?q=safari+crash+log+flash
Or, alternatively, you can look at the architecture of chrome and ask why they put tabs in separate processes, and why mozilla is also putting protection in place:
http://arstechnica.com/open-source/news/2010/03/mozilla-prev...
Apple isn't just making a wild conjecture when they say that Flash is the leading cause of browser crashes. They get stack traces sent to them by the crash reporting mechanism, and they get to count how many crashes come from what region of code. Drawn from sample sizes in the millions, this constitutes measurement.