I Broke My Boss's Expensive Pen

Yesterday, my boss left his fancy gold pen on the desk. I thought it'd be funny to take it and toss a paper wad at him with it across the room. It flew straight but hit too hard and snapped the tip off the pen. He came back and asked what happened, acting all casual. But when he saw the damage, his face went red and he started pacing. I wanted to say sorry, but ended up just nodding and mumbling something about it being an accident. Defiantly not going to admit it was on purpose.