Umm, the way I saw it, in HDTV mind you, was that his hand brushed across the facemask for a split-second, but at no time did any fingers grab on to the facemask.
And, yeah, the Hail Mary was definitely a blown defensive coverage by the Lions. They had all 5 of their guys behind the play, and no one in front of the group. ALL coaches, both college & NFL should use this play going forward as an example of how not to cover "Hail Marys." Obviously, you have to have someone IN FRONT of the pack. And oh btw, I didn't notice, but was Megatron out there for that play? If not, he should have been.