An unusual effect I noticed when taking off from Reykjavik: Little tornadoes forming in the water in front of the engine. https://goo.gl/photos/ZCsc1x8HRKUfTyLq7
Localisation is hard. You'd think a question like "how old are you" would have a simple answer. But no. https://en.m.wikipedia.org/wiki/East_Asian_age_reckoning