An Austrian woman traded a live tank shell for two bottles of wine and a picture frame on an online swap site.

The woman thought the live explosive was a dummy, and even used it as a doorstopper before deciding to barter it online, the Associated Press reports. 

But when the tank shell’s new owner called the police to examine it, authorities soon realized that the innocent-looking hunk of metal could actually explode. They had to evacuate the apartment building and set up road blocks once they discovered they had a live bomb on their hands.