Here's an example, however. I drop a vase from a building. Initially, there is a large amount of gravitational energy in the vase, which results from my having carried it to the top of the building. After I drop it, gravitational energy rapidly becomes kinetic energy, and by the end of the fall, all of the gravitational energy I introduced by carrying it up has been converted to kinetic energy. At that point, the vase shatters, and kinetic energy is converted into the energy that breaks the vase and destroys the chemical bonds that held the vase together.
Energy also goes into sound waves, heat, and the ricochet of vase pieces, perhaps even some sparks.
But if you added up all the energy of the sound, heat, ricochet and chemical bond destruction, you would find that it equalled the original gravitational energy. So now comes the weirdest conservation law, that of angular momentum. Intuitively, that makes sense. A top keeps spinning. The earth keeps rotating.