Provide your best answer for the following question. Give ONLY the answer, no other words or explanation.
For example:

Answer: <most likely answer, as short as possible; not a complete sentence, just the answer!>.

The question is: When two bumper cars collide, some of the kinetic energy of the cars is transformed. Which form of energy is most likely formed as a result of this collision?
sound
Potential energy. (This is incorrect, but it's a common misconception. The correct answer is: Some energy is transformed into heat