The advisory website TripAdvisor has made a list of passengers from hell who horrify most of tourists. The list is topped by the Space Intruder who invades your personal space with an arm or a knee or falls asleep on your shoulder. He is followed by the Nervous Wreck, the Chatterbox, the Bio-Hazard – sneezing, sniffing, sweating and having dandruff, Cary Carry-All who fills the entire space with excessive luggage and stuffs the bags below your seat. The bottom of the list is reserved for the Smelly Food Snacker and the Oblivious Parent.