What was Sticky's greatest fear after his experience in the Waiting Room?

Sticky's greatest fear after his experience in the Waiting Room revolves around the idea of facing Mr. Curtain and the pressure of potentially having to reveal his mission. This fear stems from the intense and anxiety-inducing conditions he faced in the Waiting Room, where his memories were manipulated and tested. The significance of this fear lies in the implications of betrayal and the responsibility he feels towards his friends and their mission. Revealing details about his mission to Mr. Curtain would not only compromise their plan but also betray the trust of his companions, which he holds dearly. The overarching theme of loyalty and the stakes involved make this fear particularly impactful for Sticky's character development throughout the narrative.