Visible crew/equipment: In the second basketball scene, when McMurphy shouts at Martini because he threw the ball against the fence, there's a lot of equipment visible on the left side, most prominently a big spotlight. (01:05:20)
Visible crew/equipment: When McMurphy tries to make the "dancer" vote for the world series he dances with him through the hall. When he does that you see the shadows of the boom mike and cables on them. (00:43:50)
Answer: The girls who sneaked into the ward had brought alcohol and everyone was partying before McMurphy and Chief were to escape. Everyone got drunk while waiting for Candy and Billy to finish, eventually passing out. Candy and Billy probably just assumed McMurphy and Chief had already left or they'd fallen asleep.
raywest