On Big Thunder Mountain Railroad, if you turn your head to keep watching the goat, Bloody Mary will pop out of the second tunnel and kill you.
Food prices at Disneyland are really no higher than they are anywhere else. They just appear that way because of forced perspective.
In every restroom, one of the toilets plays a Disney tune when you flush it. Try to find them all! If a member of the janitorial staff hassles you about flushing all the toilets, tell them you're doing the "Musical Thrones" activity and they'll give you a list of all the restroom locations in the park, with spaces to write in the song titles. Fill them all out correctly and hand it in at City Hall to get a special button!
All the ducks in the park are actually sophisticated animatronics. They are programmed to "eat" dropped food so that Disneyland can recycle it the next day and save money.