Stalk train

when you are creeping on someones social networking page's pictures and find a tag of someone then go through their pictures. then so on and so forth

steps: for the stalk train
1- looking on someones page
2- start creeping on them
3- find someone who was in contact with them (ex. someone who commented on one of the pictures, or was tagged in one of that who is being crept on)
4- creep on one who is crept on friends in the ex. stated above.

5-repeat with new person
6- and so one and so forth