The spell ends for an influenced creature if it's going to take any harm or if another person works by using an motion to shake the creature from its stupor. Note that full cover still blocks the effect of Hypnotic Sample alone. To paraphrase, if there have been a wall https://patron-hipnotico31864.dbblog.net/7608328/the-smart-trick-of-patron-hipnotico-that-nobody-is-discussing