Ultron is back, if only in an animated form, to take on Ant-Man in a new animated short from Marvel and Funko. His weapon of choice: Iron Man's Hulkbuster armor.

Titled "Big Robot Little Problem," the video opens with Ant-Man racing through Avengers headquarters, trying to figure out what's causing the lights to flicker. Soon enough, the hero is attacked by the Hulkbuster suit, now under the control of the homicidal robot.

An entertaining fight ensues, with Ant-Man shrinking to evade deadly repulsor rays, and employing Pym Particles to enlarge a chocolate-chip cookie for use as a (delicious!) weapon. Ultron pops up at the last minute to try to get Ant-Man himself, but he gets caught in a big way.

The short doesn't reveal any spoilers for Avengers: Infinity War or Ant-Man and The Wasp, so fear not. What it does, however, is provide a few chuckles.

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You'll be able to see Paul Rudd's Ant-Man and many other Marvel superheroes in Avengers: Infinity War, arriving in theaters April 27. The film also stars Robert Downey Jr., Chris Evans, Chris Hemsworth, Mark Ruffalo, Jeremy Renner, Scarlett Johansson, Anthony Mackie, Elizabeth Olsen, Tom Holland, Benedict Cumberbatch, Chadwick Boseman, Chris Pratt, Zoe Saldana, Dave Bautista, Bradley Cooper, Vin Diesel, Tom Hiddleston, and Josh Brolin.