A final touch by Jesus ...
"And the napkin, that was about his head, not lying with the linen clothes, but wrapped together (folded) in a place by itself." (John 20:7)
A folded napkin had to do with the Master and Servant, and every Jewish boy knew this tradition.
When the servant set the dinner table for the master, he made sure that it was exactly the way the master wanted it..
The table was furnished perfectly, and then the servant would wait, just out of sight, until the master had finished eating, and the servant would not dare touch that table, until the master was finished. Now, if the master were done eating, he would rise from the table, wipe his fingers, his mouth, and clean his beard, and would screw up that napkin and toss it onto the table, like we do in McD's or wherever.
The servant would then know to clear the table. For in those days, the crumpled napkin meant, "I'm done".
But if the master got up from the table, and folded his napkin, and laid it beside his plate, the servant would not dare touch the table, because........... The folded napkin meant, "I'm coming back!"