Well, there are rare bugs and boxes: Sometimes when you enter a new section a eek emoticon will pop up. This indicates that a rare type of bug, enchanted chest or a flying giftbox is present. If you catch it, it's yours. Be warned sometimes no matter what you do you'll get the swearing balloon and CAN'T catch it. This was supposedly fixed, but... The bugs and items are listed in Boxed Lunch's guide at the very top of the Topics list.