That's totally creepy. Do you have any links with more info on the face?
I googled and found this link to the ghost face. Apparently it's too big for my slooow dial up to load so don't know if it's a good picture or not. Google and see if you can find something.
I didn't believe Mr. M. Late at night, park at the HEB grocery, cross the street and sneak around the chainlink fence, hold your nose and step very carefully down the dock to the back of the building. Can't miss him. The face is huge.
http://halloweensunseen.com/faceutmb.html
Wow! The UTMB ghost face link finally loaded for me. Yep, that's him. Only thing is when I saw it years ago, he was up higher..... Seems they sandblasted a second time and he's moved again!!! Oh, that's just freaky!
http://halloweensunseen.com/faceutmb.html