What's weirder — that Dennis Rodman is visiting North Korea again, or that North Korea allegedly used a fax machine to warn South Korea of a “merciless” attack?

South Korea reported Friday that it received a fax from the North's National Defense Commission threatening retaliation. The threat was because of South Korean rallies held earlier in the week, reports NBC News.

Protesters at the rallies burned effigies of several North Korean dictators on the second anniversary of Kim Jong Il's death, reports the Wall Street Journal.

WSJ also notes that even less modern methods have been used by North Korea to communicate threats to South Korea, like leaflets flown over the border by helium-filled balloons.

Meanwhile, Dennis Rodman visited the country again this week. He was expected to train North Korean basketball players and meet with Kim Jong Un, who Rodman refers to as a friend.