NoAI Mount

When using

{NoAI:1}

modifier when summoning pigs with saddles, the pigs gain AI when you sit on them and hold a carrot on a stick. They lose their AI again when you dismount the pig.

If you summon a Horse with

{NoAI:1}

they the gain gravity, but not complete AI when you mount them.

If you use the entitydata command with the

{NoAI:1}

modifier on a tamed horse it gain it's AI when you ride it, then loses it again when you dismount