3.The scene in Mrs. Doubtfire where Daniel sticks his face in a cake to avoid being recognized was planned — but the crew didn't realize the heat from the lighting would melt the frosting, causing it to fall into Mrs. Sellner's tea.
4.Nathan Lane, who voiced Timon in The Lion King, ad-libbed the line, "What do you want me to do? Dress in drag and do the hula?" They then added a scene of Timon doing just that.
5.The oft-thirsted-over scene in which James Bond walks out of the water in Casino Royaleonly occurred because Daniel Craig hit a sand bank.
6.Dustin Hoffman actually farted in the phone booth scene in Rain Man, and Tom Cruise's reactions were improvised.
16.Leonardo DiCaprio accidentally cut his hand while filming his famous Django Unchained rant, and chose not to react and just continue with the scene with a bloody hand. The take ended up in the film.
17.And finally, that super-awkward yet memorable Voldemort/Draco hug from Harry Potter and the Deathly Hallows — Part IIwas improvised.