Yellowstone park

My parents came to visit this week for my birthday. We went to the Legacy air museum on Monday. It was cool and my Dad is a plane know it all. I think he really enjoyed it. Then on Tuesday we drove up to Yellowstone. Neither my mom or I had been before. This is Old Faithful. Which is getting less faithful as time goes on. I was a little disappointed it it but the mud puts and boiling earth made up for it.
At one point we were on a trail looking at boiling mud and someone said there was a bison up ahead so we went to find it. It was huge and just off the path ( 15 feetish) then we went a bit more down and saw two more bison. on our way back down the path we saw another bison that was hanging out by the first one we saw and she was coming our way . She came right down and crossed the path not more then 10 feet from where we were standing. then the huge male followed her. we could hear the boards cracking as he walked across them. I was so scared we were going to get gored or something But David and Dad were cool as cucumbers. Later we were stuck in traffic b/c of about 100 bison on and around the road. This is Arora after watching Old Faithful, tired!