For me it's the sounds of a deer walking in on you unseen but you hear it walking in the dry or frozen leaves.
That would get me pumped too,... but I haven't heard a deer walking on frozen leaves since 1068. Len ran 20 past me this morning. They stopped about 75 yards out and tried to figure out what to do. Then he came over the hill and they galloped by at 55 yards. I still couldn't hear them. I get pumped when I hear TWACK.