Inkling that Hagrid knew about Snape

Harry told Hagrid about Snape's lesson. Hagrid, like Ron, told Harry not to worry about it, that Snape liked hardly any of the students.

'But he seemed to really hate me.'
'Rubbish!' said Hagrid. 'Why should he?'


Yet Harry couldn't help thinking that Hagrid didn't quite met his eyes when he said that.

The Potions Master Pg 150