Player characters in Blades in the Dark have a special reserve called stress. When they suffer a consequence that they don't want to accept, they can take stress instead. The result of the resistance roll determines how much stress it costs to avoid a bad outcome.

During a knife fight, Daniel's character, Cross, gets stabbed in the chest. Daniel rolls his Prowess rating to resist, and gets a 2. It costs 6 stress, minus 2 (the result of the resistance roll) to resist the consequences. Daniel marks off 4 stress and describes how Cross survives.

The GM rules that the harm is reduced by the resistance roll, but not avoided entirely. Cross suffers level 2 harm ("Chest Wound") instead of level 3 harm ("Punctured Lung").