EXCLUSIVE: Lionsgate and Grindstone Entertainment Group have picked up North American rights to the dramatic thriller American Exit, written and directed by Ingo Vollkammer and Tim McCann. Based true account, the fictionalized narrative from Cosmopolis Entertainment centers on a dying California man's attempt to make amends for his chief regrets in life, which brings him to reconnect with his estranged son on what unexpectedly comes to be a dangerous, yet bonding…