JohnInKansas posted the following information here. I'm pretty sure he mis-posted and meant the information for this thread, as he shared the following...

"...will expand by about 633 inches for each degree F increase in temperature. So your bars[sic] will be so wrinkled up after they bump into each other they'll probaly crawl in a ditch and hide somewhere.

...It's so rare to see JohnInKansas make a typo like the bars/balls thing, much less to post in the entirely wrong thread.