I swear to you, our upstairs neighbors never sleep. Not only that, but we can hear EVERY FOOTSTEP they ever take. 10 PM, check. 3 AM, check. 11 AM, check. Right now, check. SOMEONE IS ALWAYS UP THERE moving around. Don't even get me started on his rolly office chair located DIRECTLY above your crib.
Which makes me wonder if OUR downstairs neighbors hear you pushing one of your four walker/trucks around every day -- or your activity table, for that matter: