i posted a while back that i had three things come to the surface of my skin while zapping- it clearly was not the same thing as the above-linked video (i had no warble before zapping, the 'worms' just came up underneath the copper while i was zapping and 'created' three warbles) but this is exactly what i experienced, except the 'worms' were much smaller (thank god).
prepare to be completely grossed out (my husband wouldn't sleep with me for two days after this happened, he was afraid that something would crawl out of me and attack him!)