A spin that pays nothing while exactly two scatters are showing earns reel five one solo spin, with the chance of a line or of the third scatter.
A second gust for the fifth reel
Second Gust islands give a near miss one more breath. The first four reels stay just as they landed and only reel five turns again.
The fresh fifth reel might finish a line, supply the third scatter that opens free spins, or come up empty. Each spin gets one gust at most, and none are given during free spins.
Worked example. Scatters land on reels two and four and no line pays. Reel five spins on its own, and a scatter landing there opens the free spins.
