Correct me if im wrong but Didn't Luke delfect an AT-AT shot back into itself during Dark Empire ?

Here is another example.

Star Wars ANH alternate ending: Bail Organa activates a borrowed lightsaber by accident, deflects the Death Star superlaser and wipes out the space station. The End

It has happened in canon, so yes.

Reva?

Eighth Brother in Rebels season 2

^^ Yup