Scrounging around, you're able to find something that will be able to be used as cover, should nothing else be available. You can only do this once every 20 seconds.

Skill: Guile
Group: Underbelly tricks
Command: GUILE IMPROVISEDCOVER
Known: No
Lessons: 112 Lessons
Ability type: Combat utility
Can target: Others
Base balance time: 3.00 seconds
Cooldown time: 20.00 seconds