Found one when i had to go on PvE3 cause the server i normally go on was full, for once. But they drink gas.. Ran over some cows, someone who was following the tank made a grave.. Then we decided to drive it into the water, because why not? But we got it stuck on the way to Pirate Cove.. We eventually drove it off the cliff, but it didn't get far... So we flipped it in the water till it despawned :> Fun times.
I have all the tanks I could ever need on my dedicated test server. They will be a pain in the butt on the JPH servers.