If you found a hundred dollar bill on the floor what would you do?

United States
January 27, 2008 6:44pm CST
if you found 100 dollar bill - what would you do if you found a hundred dollar bill?
Say you're just minding your own business walking and then you just found a $100 bill on the floor? What would you do? For me I would have saved it and add it in my prepaid credit card - save an extra $20 for gas haha! The most I have ever found on the ground was a $20 bill I think remembering I bought carne asada fries and other things. How about you?