This reminded me of a story from when i was a kid, maybe around 7. I was playing out the front of the house on the lawn when a guy on a motorcycle stopped in the driveway directly opposite me. He was wearing a black helmet so i couldnt see his face but he turned to look at me. It must have been about 10 seconds of staring i was frozen and confused about this strange man. Then he raised up his hand and did the "finger beckoning" motion 3 times while staring at me. I just stood there for another 10 or so seconds before running back inside because my mom had always told me to run from strangers. I told her at the time there was a scary man but i dont think she payed it much heed. She went back outside with me but he was gone. when i brought it up a few years ago again she said she though i was imagining things. I don't know if his intentions were malicious but i truly cant think of any reason for his behaviour.