Listen to Uncle Cerebus, kiddies: look after your back! You only get one, and if you don't take care of it..... well, you might just end up sitting at home on a workday, dosed-up with painkillers and trawling the net for pictures of spines.
And you don't want to be doing that.
You really don't.....
Soundtrack: I Want You ( She's So Heavy ) by the Beatles.