Thanks folks for the kind words. As I watch that vid I realized that a lot of details are lost, so I'd just like to add a few pics.
The skull is slightly oversize(Michael's) was bored to allow the pvc to run all the way through it.
The top is made of foam and painted to match the barrel(close anyway) with a strip of alluminum gorilla glue to the bottom
I don't know if this has ever been done but I thought it was worth showing the pvc is what everything is mounted to and it in turn comes down over the cylinder thereby creating a diffuser for the exhaust. The orange rod is just holding it up for the photo.
Great idea and looks super! We have a terrible time finding american style trash cans here but wood vats are a plenty. We may have to consider making a barrel trauma instead of a trash can trauma one year