In a desperate bid to kill just one cockroach that was plaguing his existence, a man in Japan caused a massive explosion in his house. According to science, at all times were are surrounded by up to 100 creepy crawlies. On a bigger scale, there are roughly 1.4 billion insects for every person on Earth. But one Japanese man was plagued not by millions, but by a single cockroach that refused to die. What led to the near-fatal explosion?In the early hours of Sunday morning, in the city of Kumamoto on the island of Kyushu, an unidentified man was facing off against a solitary cockroach. In a last-…