My family is currently living in a motorhome on our property while our house is being built, and every now and then I notice strange knocking? The first time I heard it behind my bed against my headboard where no one could reach from the outside. The second time I heard it was during the day and it came from the door. All three of my family members heard it loud and clear and my dog went NUTS. My dad went out there immediately after to see if it might’ve been a neighbor, and then I let my dog out and neither of them found anything. Now it’s 4am and I got up to give my dog more water and again I heard 3 knocks coming from the back of the motorhome. I was just back there and no one else is back there. Everyone is sleeping except for me. It always sounds like it’s someone knocking a fist on the outside, but there’s no one there when we check. What the hell? We’ve heard it while parked in an rv park as well, so it isn’t something that started when we got on the property.