UFO Pinball?

This sighting took place during a camping trip with three friends. At the time our ages were between 23 and 30 years old. We were sleeping outside under the stars when we saw a light object travelling at a high rate of speed. It traversed the night sky from horizon to horizon in approx. 10 to 15 seconds, much faster than any plane or satellite any of us had ever seen. A few minutes later, it or another like it croosed the sky at a slightly different angle except it made an abrupt almost right-angle turn without losing or gaining speed. A few minutes after that another similar object was seen crossing but from a much different direction. When it was almost directly overhead, it came to a sudden stp. We tried to keep an eye one it, which was difficult in a sky full of stars. However it wasn't long when we noticed yet another similar object approaching from approx the same direction, but this one headed straight for the object that appeared stationary, then appeared to "bounce" off the object at about a 120 degree angle and keep right on going, without speeding up or slowing down. The stationary object never moved again, or at least it didn't before we all fell asleep. We all talked about it the next couple of days and we all agreed we had seen UFO's.
Date is approximate.  PD