Hmmm, how old is he? Is it close to feeding day?
I'm thinking "maybe" since it's approaching breeding season, he could be becoming sexually mature, OR maybe he's anticipating feeding day.
I have one girl that is nice an calm until Sunday - and then she's out and roaming her enclosure until feeding day on Tuesday. She's getting appropriately sized meals, so I may be off on attributing that to her preparing for Tuesday.