Argo,
After some reading and your posts, I know understand how the term "off hand" is being used in the rules. I agree that the use of the spikes in this case is an off hand attack by the way the rules are written. BTW thanks for the heads up on the 6 sec. combat round. I have been using it since 1st Ed. when the round was 60 sec. and a total joke!
King Ghidorah,
The backing into an opponent would be a second attack as discribed per the rules. However, accidental damage can and does happen. It would be up to the DM to figure out how to apply that damage. For instance, your charactor is walking thru the forest and a porcupine falls out of a tree, landing on your charactor. His spikes are going to do damage if they hit an unprotected area. The same thing could be applied if your PC,wearing his spiked shield on his back, is startled and steps/jumps back into another PC/NPC behind him. There is a good possibility someones getting hurt.
Darklone,
You make a great point about the TWF situation.
And to all, thanks for the help. It seems to me that the 3.x rules turns combat into mathmatical word problems. I guess that is why in every 3.x game I've played in, there seems to be a major delay in action as PC stop to figure out every different plus and minus is a sudden combat encounter. Not to say that this didn't happen in earlier editions, just not as long or complex.
Once again, thanks for the help.
Jeff
After some reading and your posts, I know understand how the term "off hand" is being used in the rules. I agree that the use of the spikes in this case is an off hand attack by the way the rules are written. BTW thanks for the heads up on the 6 sec. combat round. I have been using it since 1st Ed. when the round was 60 sec. and a total joke!

King Ghidorah,
The backing into an opponent would be a second attack as discribed per the rules. However, accidental damage can and does happen. It would be up to the DM to figure out how to apply that damage. For instance, your charactor is walking thru the forest and a porcupine falls out of a tree, landing on your charactor. His spikes are going to do damage if they hit an unprotected area. The same thing could be applied if your PC,wearing his spiked shield on his back, is startled and steps/jumps back into another PC/NPC behind him. There is a good possibility someones getting hurt.
Darklone,
You make a great point about the TWF situation.
And to all, thanks for the help. It seems to me that the 3.x rules turns combat into mathmatical word problems. I guess that is why in every 3.x game I've played in, there seems to be a major delay in action as PC stop to figure out every different plus and minus is a sudden combat encounter. Not to say that this didn't happen in earlier editions, just not as long or complex.
Once again, thanks for the help.
Jeff