We have very little control, few triggers in the usual sense, and often get headaches or head pressure when we try to force people to front out of "turn". If someone is near the front or not too far away, he or she might be encouraged to come up if there's something they enjoy in the offing (a trip to the library, something good on History Channel, that sort of thing). It helps if the event is known about ahead of time, especially if the person is further away.

We do things based on what needs to be done, since most of the skills are in common knowledge. It's very rare that somebody can't access the "tape" or skillset for a daily or ordinary task. Hope this helps.