Found out today whilst exploring in Twin Peaks that if you use Alter Time or Warlock Teleport with another player on your mount they teleport with you. Found this out first using Alter Time then mounting up and a friend jumped on and we both teleported back on an Obsidian Nightwing. So i thought it would be cool to test with Warlock Teleport also so got on my friends mammoth and he used teleport and it took me with him also!! Maybe a good exploration tool?
1. Cast Alter Time
2. Mount up on 2 person and friend gets on
3. Let Alter Time expire and you will both be teleported!!