Some years ago I opted to erecte a wooden garden shed, and although in the correct location, it wasn't quite right, so summoning my three sturdy lads, approx 13,15,17 (good lord is it that long ago! Eldest is 29 next month) we all took one corner of said shed. Dad took charge and shouted "on my count of three move it two inch my way - one, two, three." I nearly put my back out when the shed never moved.
Dad now expressed one or two views on why said shed hadn't moved and heard the reply "how much is two inch?", I explained that this time we would move it fifty mil, lo and behold second time round it moved almost effortlessly