Rocket likes to shakes things up with his amazing sleight-of-brain. Not to worry; next time this comes up, he'll be back to Newtonian orthodoxy. Pressure causes nothing when the results are case specific and dependent on wgt. of payload and "emphemerals" and velocity of payload. It sure is a fuse or initiator of the events under examination but as stated several times, receives no symbol and no quantification in Newtonian mechanics. I have yet to see the equations for Amosian mechanics. C'mon Don, you're the brainiac here, S or GOTP.

jack