Jonny wears a red winter coat, but when a yeti-man grabs him and applies a bear hug, Jonny's in his black turtleneck without a coat. The coat miraculously reappears once Hadji knocks out the yeti-man holding Jonny.
A yeti-man sees the boys on an outside ledge and shoots (just after another yeti-man had climbed up through a window and failed to get them). Now Jonny is running up interior stone steps that weren't anywhere near them a moment ago.
A yeti-man throws a boulder down a rope bridge at Quest's jeep. If this is a true boulder, the yeti-man will, nonetheless, have to possess outstanding strength in order to lift and toss it. The boulder bounces off the front edge of the jeep's hood (leaving no damage), and, having bounced off (suggesting the boulder is made of rubber and somewhat hollow), it returns upon the yeti-man, either knocking him out or killing him.
When Dr. Quest says "The ropes won't last long in this fire," he's seen from behind until the word "fire." At that point, the camera changes to a position before Dr. Quest and Race. It's Race's lips that are moving to say "fire," not Dr. Quest's.