The brain is an incredibly important organ. You probably don't need reminding of this.
The brain has a similar consistency to soft tofu. It seems some of us might need reminding of this.
I say this because for all the sobering research and devastating first-hand accounts that have emerged in recent years about the dangers of concussion, it is apparent after the first part of the international rugby season that attitudes to head injuries are still infuriatingly lax.
Take some of the Twitter worship from well-known rugby stars when Wallabies loose forward George Smith returned to the field in the third test against the Lions just five minutes after leaving after a sickening head clash with Lions hooker Richard Hibbard. In his own words Smith "snake-danced off the field" after the collision, and in the eyes of many observers he was clearly concussed.
The decision to send Smith back on after the incident was foolhardy, yet on social media Smith was widely lauded as a hero for his "brave" return - not just from Wallabies fans, but some of world rugby's big names.