Did you see the episode where Spongebob and Sandy are trying to get into the "Salty Spitoon?" The guard has a heart tattoo on his chest. It says "MOM" on it. Sandy rips it off and puts it on upside-down. Spongebob goes up and reads it "WOW." The guy lets Sandy in. When he goes back to see if spongebob is tough enough, the tattoo is right side up again. How'd that happen?

It couldn't have been on purpose because Spongebob didn't say anything like "Sir who turned your tattoo right side up"