> Thankfully, there's not a big impact from not knowing where room walls are relative to... Let me tell you about the friend-of-friend, who was cutting holes i

> Thankfully, there's not a big impact from not knowing where room walls are relative to... Let me tell you about the friend-of-friend, who was cutting holes in his dining room wall to install [whatever], oblivious to the bathroom on the other side, and the water pipes for that bathroom...