If you start moving Franko on the old man - sort of pushing on him - Franko will tell him to get out of the way. But you're right he sometimes gets in the way anyway.
EDIT:
EDIT:
Spoiler
Most of the time the man does follow you. If you start the darths contest and then tell the man you need a break, he'll be following you for sure and you can easily get him out of the way to the hotspot
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