Happy Birthday to me!

So on Friday Jan. 25th was my 25th Birthday. Jason and I went to the Magic Castle down in Hollywood. The Magic Castle is a place where you have dinner and watch all kinds of Magic tricks. The dress code was very strict so we got to dress up.
The shows were amazing, we watched this one guy who supposedly read minds. He picked 3 people and Jason was one of them. He told jason to write down a place where his friends and him hung out after highschool, and told him to fold it and put it in an envelope. Jason wrote down Hides Big H or something like that. Jason thought this guy could never guess it! Because this was a place in Utah. So the guy asks a couple of questions and writes down what he thought it was then told jason to reveal his answer. The magician then revealed his and got the place right! Crazy! I too participated in a lot. One was there was 2 sponges one a square and one a circle. I picked the square one and had to squeeze it tight into my hand, the magician did something I opened my hand and it was the square one! then I had both of them in my hand and squeezed tight and the magician asked me how many i thought were in my hand I said 4! and I opened up and there were 6! but I only had 2 at first! How do they do that?