This pyramid is made of 6,201 baseballs, all of which I've personally snagged at MLB stadiums. In the 1990s I built a small pyramid with 819 balls that looked like this:
http://zackhample.com/baseball_collection/photos/plentiful/pyramid1b.jpg
In 2008 I built a medium-sized pyramid with 2,870 balls and wrote a long blog entry about it with a ton of photos:
http://zackhample.mlblogs.com/2008/11/06/pyramid-of-baseballs/
At this point, what's next? Building a pyramid with more than 10,000 baseballs? I would love to do that someday, but for now . . . as far as I know, the one in this video is the biggest one in the world.
This video was filmed by Brandon Sloter. Thanks for watching!