I have been informed of a funny little situation during the recent Made in Denmark.
Peter Whitefords first stroke from the famous himmerland HIll (16th hole) Saturday ended in a little cup holder on the chair of a spectator! You can see pictures of it on this link.
The Rules of Golf.
According to the Rules of Gold the chair is considered a movable obstruction, and since the ball lay on/in this, Whiteford under Rule 24-1 had to drop the ball directly under the place, where the ball lay in the cup holder!
Whiteford had a bogey on this hole and eventually ended as nr. 71 (shared) in the tournament.