3.2.1 Frankie Go Boom is an engaging and whimsical comedy revolving around the life of a young man named Frank Bartlett, portrayed by the brilliant Charlie Hunnam, popularly known for his role in "Sons of Anarchy". The movie title itself is indicative of the captivating roller-coaster ride the movie takes its audience on, with an amusing riot of hilarious circumstances, awkward meetings, and unexpected twists.

Frank, a quieter and more reserved person, has been tormented for most of his early life and career by his older brother, Bruce (played by Chris O'Dowd, who lends a creative edge to the character). His encounters with his brother often echo with humiliation and mortification, with Bruce being an aspiring film director keen on turning Frank’s every misfortune into viral video fodder.

After an enriching sabbatical of self-imposed solitude in the desert, Frank suddenly finds himself at the center of another episode of prodigiously humiliating events. His harsh history returns to haunt him after learning stories of his latest disastrous romantic misadventure have been turned into an outrageous viral video, once again by Brother Bruce.

His rueful interactions take an unexpected spin when he encounters Lassie, a character filled with her own quirks and neurotic charm played by Lizzy Caplan, an actress best known for her role in "Mean Girls". Ingenious and unpredictable, she is a former actress with a rocky recovery from substance abuse and her own story of public humiliation.

Frankie’s nightmare further escalates as he tries to woo Lassie while extricating himself from the viral sensation that his life has become. The road to redemption and reclaiming his dignity is rough and complex, crossing paths with an array of quirky characters along the way.

Notably, Nora Dunn's performance as Mom is worth praising. Her eccentricity and undying love for her sons - despite their variations in success – inject both comedy and warmth into the narrative. Her portrayal of a mother who wants nothing more than her sons to get along, despite their differing trajectories, is both comical and heartfelt.

The dynamics between the characters and the exceptional comic timing, unite to make this movie a significant addition to the comedy genre. The extraordinary plot, ingenious narrative, and its clever comedic style, characteristic of writer/director Jordan Roberts, imparts an entertaining reality check on familial relationships and modern romances.

The viewers are taken on a comedic journey as they traipse through an assemblage of eccentric people, including a transsexual computer hacker, a fame-crazy brother, a lovingly naive mother, a wise-beyond-her-years young woman, and of course, Frankie himself - a man simply hoping to get through life without becoming the butt of the internet’s next biggest joke.

3.2.1 Frankie Go Boom excels in its quirky storyline that intermingles with a sizeable portion of humor and just the right measure of romance. This movie is a true portrayal of a quirky comedy that revolves around the absurdities of life and the complex situations it often throws at us. Finally, the film is a laugh-riot that skillfully mixes involving drama, sharp dialogue, zany characters, and an underlying examination of familial bonds, personal dignity, and the inescapability of modern media.

With its eccentric narrative and charismatic performances, particularly from Charlie Hunnam and Nora Dunn, 3.2.1 Frankie Go Boom manages to be an entertaining comic joyride that embraces its absurdities wholeheartedly. This movie is undoubtedly a recommended watch if you’re on the lookout for an amusing comedy stacked up with winsome characters and an intriguing plotline. It slyly invites its viewers to join in on the chaotic fun ride while subtly emphasizing the significance of personal dignity and familial bonds.