Is it okay to run one motor in a two motor transmission?

[NoodleKnight]

Thanks for you help guys...

In theory we're just going to run the motors straight, no drill gearboxes (we remove the back-drive pins anyways when we use them). I was worried about the current generated through the non-powered spinning motors. I know that we should keep the braking setting off on the Victors, but even so I was wondering (like what sanddrag said) where does all that electricity generated through the motors go?

And what's the potential risk of using a spike in between the victor and motor? I saw a thread or whitepaper saying that using that setup would be the safest setup to run a motor (we never do it, but it does sound like a good idea, aside from the 20amp fuse on the spikes).