Freeze Frame: “I Feel Pretty” (PG-13), “Super Troopers 2 (R),” “Lean on Pete” (R)

Amy Schumer takes on the issue of body image in the likable comic fantasy, “I Feel Pretty.” She plays an insecure woman who falls and bumps her head and comes to believe that she’s a raging beauty. Although the screenwriters’ template is pretty obvious, Schumer gives a shrewd performance proving she has real acting chops.   It’s no accident that the stoner comedy sequel “Super Troopers 2” is being released on 4/20. The original raunchy farce from the comedy group “Broken Lizard” was released in 2002 and was a modest hit. Fans of the original will know exactly what kind of lowbrow humor they’re in for.   Some inept Vermont Highway Patrol troopers are sent to work in Canada as part of a border dispute. They come across plenty of contraband, but can they keep from ingesting it before they catch the culprits? It’s a little unnerving to see these middle-aged guys displaying the same childish behavioral issues after all these years. While it has some shamelessly funny moments, much of “Super Troopers 2” feels like a bad flashback.   “Lean on Pete” is an austere but moving drama about a teenager from a troubled background who works at a…