The mystery box and the egg

At the GAME LAN last weekend, I brought a "mystery box" with a egg on top of it, and I was trying to sell it for 10SEK. No one knew what was in the box nor if the egg was raw or cooked. One brave person had the courage to buy it and this is the face he made when he opened it:
So what was in the mystery box? I've been asked that now by a couple of people and if the egg was cooked or raw. The egg was raw and was supposed to be used with the mystery box. The inside of the box could have been empty, scary or something absolutly marvelous.

It was freshly made food, tagliatelle (pasta) with bacon, paprika and chili creame fraich, spring onion and spiced with pepper and curry. A real tasty meal for only 10SEK.