I so feel your pain ....... the first time I tried 350 (at a weight of 165) I was all pumped, hyped etc just like you were .... I got it down nice and easy, and it just rose to the top except for that ever bastardly lockout .... well, I rolled my shoulders and gave an extra push with my lats to try and force the lockout, and when I did my right wrist rolled and BHAM ...... 350 right on top of my nips ........

I just got lucky ..... scared the shit outta me, but nothing happened other than a nice thick red line that lasted for about two weeks .....

I so know what you're feeling .... even when you think you're ready to get back into it, do some bench on a smith machine, or do DB bench so you can feel yourself in that motion again ... that will really tell you if you're ready