Continuity mistake: When Miles and Winston are in the pool house, Miles is behind Winston while talking, but right when Miles says "all right, well either way" he is suddenly right in front of Winston.
Continuity mistake: When Miles and Winston are entering the house to confront Frankie, if you look on the ground you can see wet pool footprints, but nobody was in the pool. A bit later on when Frankie goes in the pool there are more wet pool footprints, which must be from previous takes.
