Got a hammer?
Do you live near some old training grounds or something?
Who moved it?!
Looks a bit like a very old oil filter from a tractor.
It's name is Jonny5
What was the outcome @BUDFORCE ? Did they explode it on site or take it away?
It wouldn't have been impressive, just a very small "Phuuuuft" under a big stack of sand bags with more of the noise coming from the explosive the ATO will have used unless they went with a pig stick (water jet).