Movie clips of collisions between running bipeds
1. Tackling:
(1) Good.
(2) Poor.
(3) Hard.
(4) Soft.
(5) Missed.

2. Assists:
(1) Good.
(2) Poor.

3. The "Chicken and Eagle" game: the eagle tries to catch the poor chicken and the hen tries to stand in the way. Well, "tries" I said. Let's see.
(1) From an audience's perspective.
(2) From the referee's perspective.
(3) From a TV audience's perspective.

4. Some less meaningful ones.
(1) Sideline to sideline chase.
(2) Run for life.