Quote Originally Posted by Mr. Clandestine
You really want to transplant seeds into your medium of choice when the taproot is just barely protruding out of the shell. If it comes too far out, it's common to stunt them by damaging the micro roots by peeling it away from the paper towel and/or roughly placing it in the soil.
You can easily tear the paper towel around the root where it's stuck, getting as close to the root as possible, and then plant it in the ground. This is a much gentler way to move the seed from it's germination towel to it's growing medium in the situation where it's stuck to the paper towel.