In my last entry I talked about things that make you say, "Wow!", and how that usually indicates that you have experienced something special.
Sometimes, you might witness something that makes you say, "Whoa!" In this case, that means you have witnessed something flat out crazy. Check out this video. The building is the Burj Dubai, the world's tallest building that was discussed in my last entry.
If you are going to pull out all the stops to impress your customer, make sure it makes them say Wow! and not Whoa! After all, we want them to experience something special, not something crazy!