In general objects of action lost Potency.

-su indicates that the addressee is the object of action by the third person (when followed by the second person ending).

That meant that it would rank low in the probability tables constantly being updated by the program that tried to guess which features of the surroundings were likely to be objects of action or change in the immediate future.

In this case, different respondents are presented with each sentence, and some are asked to rate how the actor seems during the event, others rate the object of action, and other respondents rate how the overall action makes the behavior seem.