When the building containing the stolen treasure gets blown up, small amounts of gold coins are sporadically falling from the sky for the next several minutes. This clearly violates the laws of physics, since a single explosion would cause all the coins to disperse instantly and fall back on the ground a few seconds later. It is impossible for the coins to remain suspended in the air for as long as they do in that scene.
When Santo shoots one of the gang members in the final shootout, the gang member grabs his own head and then falls on the ground. The actor was probably supposed to smear fake blood on his head before falling down, but the blood ends up being barely visible and does not resemble a bullet wound at all.