Incorrectly regarded as goof: The noose from which Kunio Azuma hanged was much higher when Shin'ichi and Kogoro found him than when, a few scenes later, the police were investigating the matter. The body had to be lowered in order to take it to the coroner's office, hence the lower height of the noose during the investigation scene.
Ran tells Sonoko that she broke a bone after kicking a barricaded wooden exit open about a dozen times, and yet most times she suffers no damage punching--and cracking!--posts and pavements made of concrete.