People say things they don't really think through the sense of, like "it is too cold to snow" or "he won't get there any faster by speeding". Both of these statements are balderdash*, the Arctic and Antarctic both regularly see snow and we invented cars in order to speed past horses and get to places sooner.
Another thing people will say to you when you are suffering with a back injury is "funny things, backs". NO. Sorry did I shout, it's just that there is nothing humorous about backs at all. They are amazing and when you have injured one you find all the things that you use your lower back for which you had no idea about, these include such mundane things as going to the toilet, sneezing, coughing and well pretty much everything. I have been prescribed a number of drugs to assist the rehabilitation of the facet joint more recently identified in the post "injury" but a short lived attempt to walk briskly to the post office highlighted we are some way off.
Backs just aren't funny, I even googled to find jokes where backs are funny and they aren't. They are the straight man, the Ernie Wise, the Tommy Cannon, Sid Little of body parts. So please don't say "funny things, backs" unless you really do have a rip roaring tale of hilarity involving a back.
*Balderdash interestingly has no known etymology it is a word that exists on it's own, unlike poppycock, an alternative for senseless speech, which is derive from old german for "soft dung". Please season your conversation and writing with this apparently original word.