electrical feel to laptop

Michael is this with just the outlets at your house or have you tried other outlets in a different area? Another thing I would consider is do you have access to another power cord for your macbook pro?
You can also try that as a resolution.

Weird, since my MBP's power brick comes with a three-pronged plug at the end of its cable. However, I digress... If the computer "buzzes" when plugged and you lightly drag your hand across the metal surface, it is probably incorrectly grounded. Try flipping the two-pronged plug over and see if that helps. If you can't flip the plug over cause it is polarized (one prong wider than the other), then you need an electrician to correctly polarize the socket.

Major issue: is it safe for YOU ? Cardiac patients have been known to die from minute (well-placed) microshocks...

I used to notice this on my MBP... but I eventually convinced myself it wasn't actually anything electrical at all, just a slightly odd tactile sensation caused by the finish on the case, perhaps in conjunction with tiny vibrations from the fans (which are always running in a MBP). Indeed, since I added a clear film palmrest protector to my MBP (from applepeelz.com), I don't feel it at all any more.

The power adapter places one-half of the line voltage onto the MBP chassis and, hence, to the aluminum cover. The amperage is well below the international safety limit, and does not pose any hazard. The sensation can be completely eliminated by using the 3-prong power adapter cord in a properly-grounded AC outlet.

It's not "normal" to feel a small electrical tingle from the laptop's metal case, but it's not that unusual, either. I had this much of the time I lived in London, mostly due to poor electrical systems. I have sometimes connected an alligator clip lead from the case to my metal desk or even to my wrist watch band to make sure the potential difference between me and the case was zero.

A good ground is supposed to be provided by one of the two prongs on the plug, but in some homes/offices the wiring just doesn't do a good job. It helps to use the three-prong plug to provide a separate (and routinely redundant) ground. But this also depends on the quality of the house wiring, and it may not fix the problem. If using a 3-prong plug doesn't solve your problem, then you may want to have the wiring checked. (You can buy a little thing from Radio Shack that has lights on it that help diagnose wiring problems.) There could be problems for other sensitive electronics you have.

The tingling is uncomfortable, but it's not dangerous.

I have had to re-wire some rooms in our house. Nonetheless, if I plug into one outlet and connect to a TV or modem connected to another outlet (one on a separate circuit) I sometimes get the tingling effect.

Thanks for all the infos!!! I have the same problem at home!

I have the solution now! This afternoon the electrician came an installed the missing grounding wire on the circuit! The problem was that the plug from the ground was not plugged in, if I understood right!

Now the vibrations are completely gone!