From your description of 'the angles' - had you not been wearing that belt, you might well have joined a long obituary column of folks who find belts "too much trouble' .. and who then slide out from the airbag's cushion and on into F=MA demolition.

Enjoy the soreness.. it strongly suggests that you're Still Alive. :-\ufffd

(or.. that we've all shifted into a || Universe, when the previous one abruptly went home to Mommy, because we were playing too roughly and baffled her with BS.)