I worked at a theater in high school. I worked concessions, and ran the popcorn popper most days.  We would put butter in halfway through filling popcorn on request, and allow people to add salt.  There was this one obeast that would come in twice a week. He'd get the largest popcorn.  He would then request a cheesecup full of the popcorn salt we use when popping it. And he would have us put probably 10x the butter we would give someone asking for heavy butter.  And that was just for the bottom half. He'd want the same again for the top half.  The first time I had to deal with him I warned him that much butter would leak. He smiled and pulled out a plastic shopping bag and said he had it covered.  He would get this refilled once during the movie and once again going home. He was alone at the movie, so he must have eaten it himself.