Can I use exterior paint for indoor painting?

Act 1: It's Christmas and Bean decides to visit Harrods causing his usual brand of chaos by behaving rather inappropriately for being in such a prestigious department store. After parking directly at the front of the store and harassing a man dressed as Father Christmas. Bean proceeds to shop for Christmas decorations subjecting them to his usual scrutiny - if it breaks, don't buy it. He also tests some Christmas lights using the same socket used for the exterior Christmas lights plunging the outside of the store into darkness in the process. He then starts playing with figurines performing a rather inaccurate Nativity scene involving dinosaurs, army tanks and a Dalek. The owner of the store stopped him by putting a figurine of a policeman onto the set. It took Bean several seconds to react to that.