Great Bear Sighting

I know I have posted before about seeing bears, and I have seen several since my last post but yesterday I had a sighting I will always remember. I was mountain biking in a remote part of the National Forest by myself and going up hill so I was going slowly and fairly quietly. I spotted an adult bear in the trail ahead of me about 50 yards so I stopped to watch, she didn't see me so she calmly meandered around the trail and appeared to be looking for somthing to eat, I watched her for a few minutes when out of the woods above her came 3 cubs probably 50 pounds each, they didn't see me either and went about their buisness of playing with each other and bugging their mom who was still looking for some food. Eventualy they wandered off the trail and out of my sight, I waited a few minutes and moved on, I guess I didn't wait long enough because I hadn't moved more than a few feet when all 3 cubs shot up a tree right in front of me, 2 in one tree, and 1 in another. I stopped immediately and got a good look at 3 cubs treed not more than 20 feet away from where I was standing, then I got a good look at the 300+lb. mother standing on her hind legs to see what all the fuss was. She didn't look very freindly, in fact I could sense her agitation and you could tell she was ready to defend her cubs. Fortunately I never got between her and her cubs. I backed off about 50 yards and watched 2 of the cubs come down the tree and could hear the group moving off through the woods. Kind of stunned by what I just saw I moved on, I got close to the sight of all the action when the 3rd cub came crashing down out of its tree, sort of a controlled fall with a 15 to 20 foot jump at the end. I thought for sure he was hurt after that fall, the sound was awfull you could hear it knock the breath out of him, but he got up and hauled ass thru the woods in the direction of the others. I wish I would have had a camera or at least a witness to enjoy that with. I have seen a few things in the woods over the years but that one takes the prize for best wildlife encounter. By the way I was mnt biking as a way to stay in marathon shape after I injurred my inner thigh somehow running. 2 weeks till the marathon and I still plan on running. I feel fairly confident I can work thru what has turned out to be a nagging injury.