Johnny comes home drunk and Mark helps him take off his boots. Mark goes around to the side of the bed to help pull his right boot off.
Then in the next shot (a reverse angle, looking over Mark's shoulder at Johnny talking)... there's a WALL right up next to the bed! Mark must have a ghosting ability to "go through walls" when he goes to that side of the bed. Thanks KC!
At the end of 'The Brother-in-Law', when Lucas and Mark turn and ride back down the hill, Lucas is about to lose his rifle, the whole gun boot seems to be loose from the saddle. Chuck just kept looking down at it flopping along side him. Thanks Judith Schaefer aka Stargazer!