I'm probably a little more aggressive than I should be for my skill level around corners at ~18-20mph, but I haven't fallen out of a lean (yet). I'm also a little bit of a sissy and don't want to get hurt. If I see ANYTHING that could slip me, I hit the brakes before the turn. This includes, but is not limited to: stones, wet ground, manhole covers, leaves (they could be wet, and leaves are slippery), branches, small children, large insects, sink holes, etc.