This is a pretty useless exploit but it is one none the less,
1.Find a mob
2.Kill it
3.Start summoning mount
4.Right click on the mob straight after your summon mount castbar has ended(When the smoke appears around you)
1.Find a mob
2.Kill it
3.Start summoning mount
4.Right click on the mob straight after your summon mount castbar has ended(When the smoke appears around you)