Field sobriety tests are very inaccurate.  The tests are completely subjective and should not be used as proof of guilt in any court proceeding.  Has anyone ever passed a field sobriety test in Alabama?  I doubt it.  If the cop wants to arrest you, you can bet the night in jail that your performance on a field sobriety test will make little difference.  Apparently, cops are like superman, they have laser vision.  They are able to discern an inch difference in the placement of your feet on a dark highway with little to no light,  and are able to stand on one foot while counting for 30 seconds at a time, without ever moving a muscle or slightly adjusting their leg.  I don't know about you, but standing on one foot for thirty seconds is hard to do at all, sober or not.  Don't believe me, try it.  Make sure your foot does not touch your leg or almost touch the ground, and make sure you don't sway too much while doing so either.  I have heard all these grounds used as a cops reasoning to arrest someone for DUI.  As I have said on this blog several times, do not take a field sobriety test.