Cannabis has no direct effect on muscle size, but dose changes the picture for athletes: low amounts may aid recovery, high amounts might work against you.
Cannabis is studied for dementia-related agitation, not sundowning itself, and the strongest evidence is for synthetic cannabinoids used under medical care.
It’s common to laugh while high. Cannabis lifts your mood, distorts how you perceive ordinary things, and heightens the contagious pull of laughter in a group.