When the gun thug points his gun at Nighthorse to force him to sign the papers, a gun cocking sound is heard. When the gun is seen, the hammer is not cocked.
Henry states that an asymptote is a curve that approaches a line; he has the relationship backwards. An asymptote is a line that approaches a curve but doesn't touch the curve. It is a key concept in analytic geometry.
After the shooting, when Walt responds on his radio he is holding the mic backwards.