Thunder Crack -Sit-

This is a burly addition to the Thunder Crack...

Sit start matched in the horribly thin diagonal crack/seam below the main crack. Use a distant foot at the base of the face, and whatever else you can manage to propel yourself upward to latch the first hold in the main crack.

Use the nonexistent to less than marginal feet after that to climb into and through the upper Thunder Crack to get to the top out.