The position at the front of a double decker bus, on the right hand side, when you drive through a low-hanging tree. The impact of the tree branches against the bus gives the exciting impression of a 3-D ride to the thirteen children crammed into the one seat, who will scream “3-D RIDE!” as they tumble dangerously to the floor.

One morning the window of the bus actually broke and showered me with safety glass. (I wasn't cool enough to be sat at the back).
Having decided that that was embarassment enough and not being injured in any way (it being safety glass), I said nothing until one of the other boys announced it to the form in registration.
So, I was carted off to be "looked after", as though I was some frail thing suffering from the trauma of being showered in something safe. The coup de grace, however, was being sent back to my form with a nice cup of sugary tea.
"It must have been serious, she's got a nice cup of tea."