Writer/director Ben Falcone likes to cast his wife, the endlessly talented Melissa McCarthy, as characters who are impulsive, not very bright, and not very good at reading the room, picking up social cues, or keeping thoughts unspoken. So, we know what we’re going to get from “Thunder Force,” with McCarthy as a forklift operator and Van Halen fan who unexpectedly becomes a superhero. I prefer their “Life of the Party,” with McCarthy in less of a slapstick role, but of course it is fun to watch. It takes too long to get going, with a not-very-interesting origin story, and three things are not as funny as they hope: references to 90s pop culture, questioning the sexual orientation of the heroines, and having the bad guys kill people.

There are two twists to the usual superhero backstory here. First, and most intriguingly, it is set in a world where the only people with superpowers are evil. Back in the 80s, a radioactive blah blah but it only affected those with a genetic predisposition to be receptive, and all of those people were sociopaths. So, ordinary humans are powerless against a bunch of selfish, conscienceless, supervillains who behave like the mean kids in middle school. Except instead of not letting you sit at their table in the cafeteria they throw electric fireballs that blow things up. They’re known as the Miscreants. (Great word!)

The Miscreants include Bobby Cannevale as a mayoral candidate who insists on being referred to as “The King” (not funny the first time or any of the subsequent times), running against an AOC-like rival named Rachel Gonzales (Melissa Ponzio), and “Guardians of the Galaxy 2” star Pom Klementieff as Laser, who has the power of throwing electrified fireballs and the hobby of killing people.

Second, the superheroes here are middle-aged, plus sized ladies. Lydia (McCarthy) and Emily (Octavia Spencer) met in a Chicago school, when Emily, a brainy transfer student, was being bullied and Lydia stood up for her. They became friendship bracelet-sharing BFFs, and spent a lot of time together, including dinner with Emily’s grandmother, who took Emily in after her scientist parents were killed by the Miscreants. Emily is determined to carry on the work of her parents and find a way to defeat the supervillains.

Lydia and Emily become estranged in high school, when Emily says she has no time for anything but her work. Years later, as their reunion approaches, Lydia is a forklift operator in a Slayer t-shirt and Emily is the founder of a hugely successful company with a new headquarters in Chicago. Lydia goes to the the office to bring Emily to the reunion, is told not to touch anything, but is incapable of obeying that or pretty much any other cautionary direction. Suddenly she’s in a dentist chair-type thing with needles going into her cheeks. She has accidentally injected herself with the serum Emily has been working on for years to create superpowers for good guys. Her colleagues are Allie (Melissa Leo), and Emily’s super-smart daughter Tracy (a warm and winning performance by Taylor Mosby), a college graduate at age 15.

Lydia continues to get the injections, building up her strength, speed, and fighting skills. For some reason, this involves eating a lot of raw chicken. Meanwhile, Emily is undergoing a far less strenuous regimen, to give her the superpower of invisibility. Finally, they are ready to go on a trial run, stopping the robbery of a convenience store. At this point, Lydia and Emily prevent the thugs from stealing money but even these two powerhouses cannot prevent Jason Bateman from stealing the movie. I won’t spoil who or what his character is, but he is far and away the movie’s highlight. He and McCarthy spark off each other in a delicious manner, both with exquisite comic timing and unexpected and offbeat rhythms. Now that is a superpower.

Parents should know that while this is a comedy, there is some scary action with explosions, murders, and potential domestic terrorism. There are repeated references to the deaths of Emily’s parents. The movie also includes some strong language, alcohol, suggestive content and brief potty humor.

Family discussion: What super powers would you like to have? Why did Lydia and Emily like each other? What did Emily learn about Lydia from Tracy?

If you like this, try: “Life of the Party” and “My Super Ex-Girlfriend”