How to deal with diffeomorphism symmetries is one of the difficult problem in
general relativity. Because of the diffeomorphism symmetries, we need to
consider diffeomorphism invariant operators and gravitational dressing. In this
work, we consider a special gravitational dressing which is to locate the
operator by orthogonally shooting geodesic from the spatial boundary. We try to
use Peierls bracket to study the commutator between this gravitational dressing
operator and the ADM energy operator. We found the ADM energy increase/decrease
when the extra created particle is in front of/behind the event horizon. Our
result strengthens the Marolf-Polchinski firewall argument in some sense.