I reset the SMC and thought that had fixed it but I another incident later. I was on the same website and the screen locked up and one my icons in the doc was jumping up and down. I shutdown and reset the SMC again and haven't had the problem show up again. That was 2 weeks ago. I think I will do a clean install when I upgrade to the new OS. I will wait for another update or two before making the plunge.

Common sense and deodorant are a lot alike. People who need it the most don't use it.