Throw Jack Herer, Cinderella 99, and Lemon Cake Boom into a blender and you come out with a wicked hybrid sativa named Amnesia Cake Boom! Finely ground cannabis flowers rolled ahead of time, commonly known as joints or blunts. More adventurous consumers might experiment with infused pre rolls that contain cannabis concentrates to amplify the flowers’ entourage effects in enhanced flavor and potency. Pre rolls typically have an immediate onset with effects lasting an average of 2 - 4 hours.