Aikinage and koshinage

Let me tell you about a cool thing that we played with the other day. That's the relationship between aikinage (iriminage or 'the clothesline' to some) and koshinage (hipthrows). In our syllabus there is no explicit teaching of koshinage. Most of us are judoka also, so we're sorta assumed to get some exposure to koshinage, but there is another reason for not spending a lot of time beating koshinage to death. The variation of aikinage (iriminage) that we most often learn and practice is identical to a common setup for koshinage. So tori gets two throws for the price of one and uke gets to decide whether he takes a backfall (iriminage) or whether he takes a forward roll over tori (koshinage).
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So, how do we do this miraculous, dual-purpose iriminage? the attack is evaded to uke's outside and the head and arm are captured and led in a spiral. When uke resists this circle, tori's circle reverses so that tori is backing into the front of uke's legs. This is very disorienting for uke and typically leads to uke falling back or sitting down out of it. However, occasionally, uke will turn in toward tori and tori's backstep into uke's legs becomes the setup for koshinage. Works great and makes teaching koshinage easy.
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Here is about the best example I have found online of the motion I'm talking about. In this video the tori is making the same motion pretty consistently, but the uke with the hakama is choosing to turn into koshinage and the uke without the hakama is taking the fall from iriminage.