Ka6 Years ago in a booming thermal 1,100' per minute over the Poconos approaching cloud base. When I looked up and estimated 2 more turns and I would be in the cloud . I exited the thermal and heard the 747 before I saw it apox 9,500 msl . I saw it for a brief eternity where I would have been !!!
A good reason to abide by the FARs.