For a moment, Leon wondered why his master kept asking questions to him if he wasn't expecting an answer. Then again, lots of other people talk to their pets, so why not GM? Well, whatever, Leon didn't mind being alone for a while. He could behave, he could be a good boy. Right? In fact, he was going to help GM! The man left his computer right open for anyone to walk in and use it against him. That wouldn't do at all, now would it. As such, Leon walked over to his master's laptop with the intent to close it. 
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Some time later, Leon found himself looking at whatever was open at the laptop instead. Unbeknownst to him, in the process he had hit a hotkey to release one of GM's premade monsters, which was now seeking out something to feed on (i.e. the crew down at the ground).