Explain this one

Can anyone familiar with human physiology explain this one to me:  When I cut my hands (cooking or cleaning, or something), it's no big deal; when I get a cut on my feet (today my daughter's cleets took off most of one of my toenails), I start to black out.  Why in the world?  I'm generally squeamish about blood, but I can't understand why the drops from my hands or arms should be a non-event, while the bleeding toe has me sitting on the ground with an ice compress to the back of my neck.  Any guesses?