Every few seconds an explosion in the cannon's lower chamber sends a loud boom skyward; the thinking is that the resulting shock waves will break up the ice before it reaches the ground. (scientificamerican.com)
After a fictional second explosion at Chernobyl, the land surrounding the nuclear plant has become a wasteland known as the Zone, where mutant creatures and humans roam and the laws of nature no longer apply. (lifewire.com)
Held back by police, they were waiting some distance away near the Ministry of Urban Development and Housing, when the second explosion went off just as people were entering the government office. (cnbc.com)