"I don't know. If we make another wish, then it might make things worse." The other Jon replied.
"Well the only way is to find out is to try it." Jon insisted.
"Lets just think this through first." his other head argued.
"No"
"Yes"
"NO"
At this point the two were having a body battle. Since they are basically conjoined twins, each controls their side of the body. Unless they work together, they won't be able go or do anything.