There was a 1,000' dirt bird dog strip at LZ Sally, RVN in 1968. 25 miles farther north, there was a 3,500' strip with steel mats at Camp Evans. I was new in country and was watching a C-130 make a low pass at the strip at LZ Sally. One of the old hands said, "They do this all the time...they make a low pass and realize that this is just a little dirt strip and head on up to Camp Evans." Well this AF pilot decided that LZ Sally was his destination. He brought that bird into the bird dog strip, safely. After he was embarrassed by his mistake, he unloaded the refrigeration units he had on board, backed up the C-130 to within inches of the POL drop-off and successfully took off. The troops in the perimeter bunker at the end of the runway really got a scare!