It just so happened I was there with my camera phone.

Main Entry: ²stalk
Function: verb
Etymology: Middle English, from Old English bestealcian; akin to Old English stelan to steal -- more at STEAL
intransitive verb
1 : to pursue quarry or prey stealthily
2 : to walk stiffly or haughtily
transitive verb
1 : to pursue by stalking
2 : to go through (an area) in search of prey or quarry <stalk the woods for deer>
3 : to pursue obsessively and to the point of harassment
- stalk·er noun

(from http://m-w.com/cgi-bin/dictionary)

1 : to pursue quarry or prey stealthily <-- or a more common word would be "discreetly"
3 : to pursue obsessively and to the point of harassment <-- I don't do this.

HOPE THAT CLEARS EVERYTHING UP.