Brain and body are amazing. One example, ask someone to estimate the distance to an object. Then get them to throw a stone at it. Mostly the throw will be more accurate than the estimate. As to the blindfolded throwing, how many times were people allowed to throw after the object moved? if more than three then easy to work out where target should be. Time taken to move it, minute sounds, even involuntary sigh of person as they placed it etc. all clues.
Our dog, when we first got him, was on the lead walking past a hedge. He jumped sideways into the hedge and came out with a rabbit in his mouth. If they let themselves be humans are just as able.