I am pretty sure I handled this okay, but want to check.
A lion was running to attack the rogue, and ran past the Monk.
This triggers an AoO.
The monk grapples the lion, this stops the lion.
The lion is not grappled, but can attack the monk.
(At least until the next round when the damned "how-can-I-screw-up-coredumps-plans" monk also pins the lion.
(when pinned, the lion can only try and get out, right?)
A lion was running to attack the rogue, and ran past the Monk.
This triggers an AoO.
The monk grapples the lion, this stops the lion.
The lion is not grappled, but can attack the monk.
(At least until the next round when the damned "how-can-I-screw-up-coredumps-plans" monk also pins the lion.
(when pinned, the lion can only try and get out, right?)