Algodoo

We already know about this glitch. Someone reported it a couple of weeks ago.

oh to anwser that i was trying something new so i dont know much about Glitchs nor much about stuff.

I think this is just a weird feature of the collision engine. If an object is intersecting another object but it's moving out of there fast enough already, the collision is not executed. this is to prevent more violent collisions to occur, resulting in new energy out of nowhere.

It also has to do with the "sim frequency". If set too low, objects will not always collide with each other especially if they are moving relatively fast. If set too high, the overall execution speed of the scene will bog down, especially if there are a lot of objects in the scene, and if the computer has a slow processor. The default sim frequency of 60Hz is about right for most scenes and computer types.