And if you have small children around you can "amaze" them by making lightning bolts at night by getting out of the car and touching the key to some metal object. LOL
The colder, and dryer, the air the better the arcs of electricity. I have had them a few inches long and very dense.
The worst zap I got was with an antenna that the girls have on a TV here. It has the two "rabbit ears" and a round one between them. I went to adjust the round antenna one cold/dry night and had two fingers numb for about an hour with that discharge.