Algodoo

This is similar to antoine31 bridge, but in my opinion is substantially different in that it is much stronger and can handle 25 times the load and has 1/35th the deflection of antoine31's. It also has 35% fewer objects and is 99.7% lighter than atoine31's. Feel free to improve on this scene. This scene will run in Phun if the spring strength is set to 5.

P.S. I had originally uploaded a scene in this spot that used the onLaserHit event to create a controlled extension of the spring. It worked slightly better than this, but did not work in Phun.