Really grips my lower intestines when you go to Naxx and begin to summon your party (normally cos they are going for the /afk in IF achievement) only to be greeted by some nancy on a Travellers Tundra Mammoth or on a brand new Blue Proto Drake blocking the summoning stone "lol"ing at the guys asking them to dismount!
Should be classed as indoor, when you lant/get summoned, you also get dismounted....
Rant over.