I was recently reminded of an incident that happened a few years ago.
When C was about 3 or 4 i used to take him to an opportunity group. It was quite a small group which suited C as he didn't like other children!!
After about an hour of being at the group we were all startled by shouting coming from somewhere else in the building. We rushed to find out what the commotion was. A boy who was obsessed with doors had looked himself in an office. And was refusing to come out.
The mother was panicking. We all tried coaxing him out, picking the lock, all to no avail. So the mother decided to call the fire brigade.
Whilst all this was going on C was getting very anxious and had started headbanging the walls and floor. In those days he used to have a helmet, so i thought i had better put it on.
I knelt down infront of C..........................
And the next thing i knew i was flat on my back looking up into the eyes of 3 fireman!! For a second i thought i had died and gone to heaven, until the throbbing from the bump on my forehead kicked in, that i realised what had happened!!
Moral. Do not put a helmet on a headbanger from the front!!