While Iron Man and Ultron duke it out, Quicksilver and Scarlet Witch seem to have their hands full with Thor and Captain America. Of course, thanks to his super speed, it’s generally hard to tell what Quicksilver’s reaction to a particular situation is. Much like DC Entertainment’s The Flash, he is generally a blur.
After Ultron asks Quicksilver and the Scarlet Witch not to compare him to Iron Man, whom he describes as a "sickness," Iron Man swoops in and quips that Ultron is going to break his old man's heart. Iron Man created Ultron as a peacekeeping program, but Ultron turned into a villain after deciding that humans are the enemy and attempts to eradicate them from the Earth. Now, it's up to the Avengers to stop Ultron and save the world from total destruction.
In the clip, Iron Man and the rest of the Avengers confront the artificial intelligence program Ultron, which leads to a full-fledged battle between Iron Man and Ultron.