"I have an odd feeling about these Ents: somehow I don´t think they are quite as safe and, well funny as they seem.
They seem slow, queer, and patient, almost sad; and yet
I believe they could be roused.
If that happened, I would rather not be on the other side."
"Yes!" said Pippin. "I know what you mean.
There might be all the difference between an old cow sitting and thoughtfully chewing, and a bull charging;
and the change might come suddenly.
I wonder if Treebeard will rouse them.
I am sure he means to try. But they don´t like being roused.
Treebeard got roused himself last night, and then bottled up again."
John Ronald Reuel Tolkien