Bad Grandpa .5 focus on the world of Irving Zisman with unbelievable bonus scenes and hilarious pranks featuring Catherine Keenerv and Spike Jonze… plus a look at the evolution of Johnny Knoxville’s naughty alter-ego, the Academy Award nominated makeup effects, and an exclusive behind-the-scenes peek at the idiocy it takes to make a hidden camera movie in public. Irving may be too old to chop the lettuce but he can still toss the salad!  .