Sir Thumps a lot did that to me last night. [Edit: sprayed me in the face]
He never started spraying until I brought Bunnie into the mix. It could have been his age but I'm pretty sure it has something to do with a Pretty and Fertile female rabbit.
He has his appointment to get fixed on Wednesday. I can't wait. Once he did that I promised myself that I'm going to try to get it done this week.
Moving him up will probably help a lot.