The rear bumper of my vw t4 van
Well you would normally hope to find a bumper bar ( and in in my case tow bar also )
But what I appear to have in place of the bumper bar is a load of crusty brown sh!t and the start of some tin worm.
Black bumper bar is one I refurbed, just added it to the pic for reference against the brown mess currently living in my rear bumper.
Fyi if you start to hear crunching when you step on the rear bumper expect something like this underneath.