yah, you'd be surprised at the amount of abuse that a plant can take, it amazes me sometimes really.. than other times they seem like they can die at a drop of a hat till they're pretty established, lol, but fortunately snapping stems is something that they seem to bounce back from really well.. it may slow growth for a few days till it recovers from it, but it should heal up just fine with a callous formed at the wound site..
like others have already said, you can splint it up and i wouldn't use duct tape, but you can wrap it with some string after you splint it.. make sure to remove the string and splint after it appears to have healed up is all..