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The incident happened after a man broke [up|out|out of|down|into] with his girlfriend. He decided to take revenge on her, so he broke [up|out|out of|down|into]the local laboratory where dangerous scientific research was made. Unfortunately, the alarm system had been broken [up|out|out of|down|into] months before, so the man was able to get in. He decided to take a white mouse and put it into his ex-girlfriend's bag later to make fun of her. When he came into the room with mice, a mishap broke [up|out|out of|down|into]: all the mice attacked him aggressively. The man was too confused and didn't react, so he didn't manage to break[up|out|out of|down|into] the room. Luckily, there was somebody in the laboratory who helped the man and called the ambulance. Now the man's health is not under threat anymore, but he will have to go to court and pay a big fine.