Creepy Gnome?

Something like a Gnome is scaring people in Argentina and throwing rocks at kids:

We were chatting about our last fishing trip. It was one in the morning. I began to film a bit with my mobile phone while the others were chatting and joking. Suddenly we heard something - a weird noise as if someone was throwing stones. We looked to one side and saw that the grass was moving. To begin with we thought it was a dog but when we saw this gnome-like figure begin to emerge we were really afraid.

Watch the video to see his walk, which is probably the scariest part of all.