The explosion produced a loud booming noise and even shook the ground.
How Ridiculous on MSNOpinion
Watch what happens when you inflate 20 random items until they explode
They took 20 random items, pumped them full of air, and kept going until something finally gave way. From hot water bottles ...
The discovery caused officials to evacuate 18,000 people on Wednesday, the largest such operation ever in the city, emergency services said.
Iran's sports and youth minister said it's "not possible" for the country to take part ...
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