In-Universe:
The U.S.S. Defiant approaches the U.S.S. Malinche which was wounded in a sneak attack by Michael Eddington and the Maquis.
Production:
"The rolls and thrusters bursts Dax announced were brought to life by Gary Hutzel's crisp motion control photography of the Defiant and DS9."
— Cinefantastique Volume 29, Numbers 6/7 (Page 45)