Be aware there are spoilers for The Wave below. Justin Long takes a hallucinogenic trip down an existential rabbit hole in The Wave, the new psychedelic thriller from filmmaker Gille Klabin. Long stars as an insurance lawyer, Frank, who's a little too good at a very bad karma gig. Celebrating a new promotion, Frank heads out for a night on the town with his co-worker Jeff (Donald Faison) and winds up caught in a surprisingly wild and increasingly bizarre night when he meets a girl (Shiela Vand), does some drugs, and winds up skipping through time in a …