My only problem with the whole concept of that line is that it seems like Obi-Wan has made up his mind then and there, and then a few seconds later on the cliff, it's like he changed his mind and he's trying to get Anakin to stop, and then a moment later, he's bawling Anakin out and leaves him to burn. Instead of having any tension as to what Obi-Wan will do, it just ends up being confusing.
My only problem with the whole concept of that line is that it seems like Obi-Wan has made up his mind then and there, and then a few seconds later on the cliff, it's like he changed his mind and he's trying to get Anakin to stop, and then a moment later, he's bawling Anakin out and leaves him to burn. Instead of having any tension as to what Obi-Wan will do, it just ends up being confusing.