put away your slide rules, calculators, pcs etc. Go out into the fresh air, look at that block of stone. Kick it, embrace it, switch off that fine-tuned analysis engine thats busily working out angles and forces and think how the hell do I lift this up?! Its in my way, I need to lift it and with sheer animal might and strength, shove it, handle it and get back to basics - back to real problems that cant be addressed by power tools or JCBs or 500mhz computers. Its just you and 10 tons of granite under the stars and one of you is going to win...