Try Ruby is a interactive shell that quickly and whimsically teaches the Ruby programming language. Originally _why's idea, it has been recreated from the ground up by Rubyists who have a passion for Ruby and for teaching their fellow (wo)man how to program.
When it gets to >> File.open("/Home/comics.txt", "a") do |f|
...it just hangs. Reset doesn't fix anything, forced to do next. Using Chrome on Mac OS X.