Interesting question. Perhaps the following is an example?
There is a well known story about students of the founder clearing terrain to create the Aiki-En, the Aiki garden. They were not able to move some of the big rocks and logs of wood. They asked O Sensei about what to do with it and he came along and moved the rocks without any effort. Would you consider this as an example of IS/IP or is something else going on here?
When I heard the story (told by a guy who said that it had happened to him), it sounded mostly like Ueshiba was smarter about leverage than anything else.
OTOH, I've heard several students of Ueshiba repeat the same stories (not this one, I'm just mentioning this by way of a general example) - and in each case they were the person that it happened to! So, there's no telling how accurate the version I heard was.