Don’t whack yourself on the head with a load restraint bar. It [zb] hurts (although not as much as having your scalp stapled back together…) 
Feel free to laugh now… 
Well you did say it was OK.
Hope you get better soon.
you didnt damage the bar did you? probably have a hell of a headache tommorow oops today.
Oh bugger, now someones trying to get us all to wear hard hats - stop it. 
please note the following MrFibble,where when was your last
Risk Assement, for this task. In addition where was you Hard Hat
which is required when working with METAL OBJECTS:
what HAVE WE LEARNT FROM THIS it hurts when hit on
the head,and secondly your fellow mates do so like
------TO TAKE THE MICKEY-----
JOKEING aside hope that you are okay ,and now
to be serious,be careful in the future as these
straps can do even more damage as have heard
of worse and more seious injurys happening with
such trailer straps, all the best and take care