Can leaving the plug halfway into an electrical outlet cause it to burst out and emit sparks that can shock your hand near the outlet? Because sometimes if you can't plug it in quickly enough you can literally hear the electricity floating around and burn marks on the metal prongs can be seen when pulled out. It just worries me that the electricity maybe could create a gap from the metal prongs to your hand through the air by a blue spark or something.

Or is the electricity so relatively low in amps and voltage that a gap through the air isn't possible and you HAVE to physically touch the metal prongs to become a part of the circuit?