"Unwrapped"

My best friend was always a little deranged. For every occasion, he would find a way to scare us to make him laugh. But the scares weren't like jumping up behind someone to scare them, it was instead like putting a dead animal in your car and laughing hysterically when you uncovered it. He would always happily pull these jokes on us for a cheap laugh.
Today was going to be the day when I would get the last laugh. I had a little trick up my sleeve for the Christmas party at work tonight. I truly couldn't wait to see his face twist in horror when he sees what I got him.

Here they were now, everyone walking into the building, anticipating the gift giving and belly stuffing and intermixing alcohol that the night had in store for them. I waited in my car, staking out when my special friend would arrive. Finally, he did, pulling up in his musty old truck. It roared the clunky tune of a machine on its last legs.
He pulled up next to me when he saw me sitting inside. His car turned off, filling the air with silence that once was flooded with noise that made my ears feel the most intense unease.
He got out of his car and knocked on my window. I got out and greeted him. I stopped him before we'd walk to the front door of the building in order to give him my present. I told him it was a little unconventional, since this was a secret Santa gift exchange we were about to walk into, and he wasn't my secret Santa.
I handed him the gift and he began to open it. He shook it before opening to see what may be inside. He commented on it feeling a little heavy. He started tearing into the wrap before pulling his hand back in pain. He looked at his finger to see a drop of blood. He figured he must've gotten a papercut. He wiped it on his pant leg and continued tearing into it. He once again pulled his hand back, noting it was bleeding.
I played the act of being concerned. He almost completely got the rest of the wrapping paper off before tossing it to the ground. He looked down at his and to see that it was completely torn up and sticky from his own blood. He asked me what I'd done to the wrapping paper. I shrugged and replied that I had no idea, I'd just bought it that way.
He tore open the box... and a dead cat's head sprang out at him like a jack-in-the-box. He jumped higher than I'd seen him jump before. He glared at me for a few moments, remaining completely silent. Before bursting out laughing. He loved the gift I'd given him, as fate would have it. He even commented that the fake cat head looked just like his own cat. I played it cool. There was no way I'd ruin Christmas night for him by saying it wasn't fake.