This achievement takes place at the very end of
Mission 7; directly after speaking with
Talos Rucker.
In order to unlock this achievement, you must have the enemy shoot a cucumber which can be found in batches in the market just outside the Rucker debate. There are a few cucumber spawns, but they are easily found along the sides of the main path. Feel free to use painkillers prior to running outside to take more damage before dying. The tactic here is to get noticed, and stand near the cucumbers so that the bullet whizzing by hit the cucumbers and destroy them, unlock the achievement.