It basically means to spoil carefully laid plans, For example;
"Don't upset the apple cart by revealing where we're going."
Jonny depp - 1963/06/09. Ben stiller - 1965/11/30. Halle berry - 1966/06/14
Aldrich Hitchcock was considered one of the best English director. He has a technique in getting people's attention through the visual effects of his films where some of it are optical effects and others are mechanical effects.The sound and visual techniques require less attention like his film entitled "Blackmail".
Aside from being a director, he is also a producer and he popularized McGuffin technique.
Answer:
The 163-storied Burj Khalifa in Dubai is the building with the highest number of floors in the world.
