Spray paint Art!

This is completely off-topic and not related to ANYTHING were doing in class but I found this video online a couple weeks ago and I have been meaning to show it to my class and when I did they were all soo amazed on how it looked and how it turned out and how the people did it! These two people in New York did Spray Paint art on a canvas in 5 minutes, of the city around them and it was amazing! I had to show you guys too...

This girls work was sooo amazing! I watched this video like 10 times now and I still can't get over it! :O

This guys Art was also sooo amazing I loved how both of them did it! :) it was sooo cool and different, I', considering spray painting more often and trying to develop the skills to do something like that :)
Tell me what you guys think! thanks