first, get the thing that makes you look like a small robot. Then enter the first hoverboerd race in blackwatar city as a robot. everything should freeze but you as a robot. turn into Ratchet and then turn around and run until you reach the biggist platform that you could jump over originally with the hoverboerd. now that you've done that, go under that same platform I was talking about. take out the taunter and hold down the botton and wait. as long as you hold the botton, your amount of bolts that you carry should increase rapidly fast! By the way, I can't tell you how many bolts I made in 15 minuts!!! And if you don't believe me,just do it and see who owse each other 5 dallers$$$