Ahh, so THIS is the event that the webnovel referenced, but didn't have in the web novel and was only something that happened in the light novel. Later on in the webnovel, it referenced this trip, but it never had this event in the web novel, so we could only guess that it was a light novel only event. I wish they wouldn't even reference it in the webnovel if it never happened there, since it makes it SO FREAKING CONFUSING to refer to characters and event that never happened as if we should already know them. WE'RE NOT MIND READERS!