This tree grew over a statue, making it look as if there is a green man trapped inside

There should be an episode of Doctor Who where Amy stares at a weeping angel for years until a tree grows over it and traps it there forever.
The Girl Who Waited

Psst. Hey. Hey, kid. Wanna buy some of the good stuff?

"Help"

If anyone watches Once Upon a Time... Perhaps it is Merlin trying to escape. :P