Ask HN: Has anyone experienced small electric sensations when using macbookpros?

I recently bought a new macbook pro (2014 15") and noticed that after switching from my old macbook pro(2012 13"), I could feel slight electrical sensations when resting my hands on the new model. Both outlets were tested and the electrical wiring in the building was correctly done. Both models were plugged into the wall via magsafe --> extension charger cable, which has the 3 prong grounding ability. I wonder if the apple manufacturing process has 'lemons' where the charge doesn't properly ground itself on certain laptops?

I really hate discussing this cause I feel I need to spend 5$ on a conspiracy tin foil hat lol. but strangely i DO feel more tingly/electric sensations on the new laptop after using it in the hands.