(CNN) Demonstrators pack public squares. Flames shoot into the air. Tear gas sends crowds scrambling. Bodies are carried from the streets.

Dramatic scenes are unfolding during anti-government protests in three disparate countries this week, on three different continents.

The images are striking, and things are heating up quickly. What’s happening on the ground?

Here’s a cheat-sheet guide to the protests in Ukraine, Venezuela and Thailand:

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