In Sweden, at the high school I went to, we had pay phones which would behave as if you had inserted a coin if you zapped it with static electricity. We used th

In Sweden, at the high school I went to, we had pay phones which would behave as if you had inserted a coin if you zapped it with static electricity. We used this for a while to make prank calls to other countries. Typically to random numbers we just tried, sometimes in the middle of the night in the other country.