Wtf are you talking about? People don't just use microwaves on other people, let alone in apartment buildings. They build a giant microwave or some sci-fi pistol? You can't read minds with microwaves as they would provide no information and only end up cooking the brain as concentrated waves would just about cook anything they touched. I assure you the same people are not "gassing" a person either, whatever that means. And you should not be asking how to gas an entire apartment. If anyone was gassed and you entered their apartment, you be liable for breaking and entering and arrested, as well as assault with an agent (in this case a sleeping agent). Just face it, the people upstairs are just normal people. You need to get help. Like serious professional, psychiatric help.