I don't know what people are telling you, but having your feet cut off does not make you faster.
a lockable bathroom? that's... weird.just hide in there and look for an air vent to climb into. remember to put it back in place so he is not suspicious.
Scratch your head and continue.
Search boxes.
Next time, remove the lid, don't just smash the damn thing. Next box.
some lady: do something