I actually have 2 lawns that I do that are so bumpy, that I actually come off my seat several times while mowing. I know, of course I can go 2 mph, but I can't afford to do that, and really, it doesn't make it much better. They both were obviously 'finished' without top soil, just that fill crap they have around a construction site, they somewhat level it, and seed it. Neither are little accounts, one is my biggest paying account (its an addition they just put on thats bumpy), the other is a new one this year, couple acres, and I would tell them I just can't do it, but the lady that runs the place, that hired me, I do her house, so I don't want to piss her off. Both places have rocks that come up to the surface, I've hit several at both places, ive gone through 2 sets of blades at the one place, and ive mowed it twice. Is there anything I can do or suggest to them to make this situation better? I know a nice layer of top soil will fix it, but your talkin tractor trailer loads of top soil, no ones paying for that. What do you do in a case like this? Quit? go slow and spend 2 hours on a 1 hour lawn?