Last Gasp

 (also known as Breathing Space) is a challenge in Survivor.

Rules
The players must swim under a steel grate and stay above the water. As the tide rises, player will run out of breathing room. If the fear of drowning is too much, that person can bail out. The last person still in the grate wins the challenge.

Usage
This challenge debuted in  as an Immunity Challenge. An additional stipulation noted that the first person to bail out of the challenge would be banished to Exile Island. Six minutes into the challenge, a cold and panicked Janu Tornell opted out of the challenge, and was the first sent to Exile Island in Survivor history. The Tribe lack of concern for her, despite saying otherwise, impacted Janu's subsequent gameplay and ultimate decision to quit. Eventually the women dropped out of the challenge leaving Tom Westman, Ian Rosenberger and Gregg Carey fighting for immunity. In the end, Tom outlasted and won immunity.

The challenge reappeared in  as the first Immunity Challenge for the newly merged tribe Dabu. Ultimately, it came down to Jason Siska and Ozzy Lusth. Ozzy bailed out, giving Jason the immunity win.

In, it was the second individual Immunity Challenge. After John Cochran, Eddie Fox, and Reynold Toepfer dropped out in succession, only Andrea Boehlke and Brenda Lowe remained. Eventually, Andrea opted out, making Brenda the only woman to win this challenge.

Trivia

 * This challenge was used in both seasons filmed in Palau.
 * This challenge was used in both Fans vs. Favorites seasons: and.
 * Erik Reichenbach is the only contestant to participate in this challenge twice.
 * Brenda Lowe is the first and currently only female to win this challenge.
 * This is the second time Brenda won the second individual immunity challenge of the merge.
 * Both times the challenge was used for a merge tribe, the color was green.
 * Had a merged happen in Palau, The tribe color would also be green.