In Hearthstone (or basically in every turn-based game), a few seconds of waiting, while it's the opponent's turn to act, can be frustrating. Markytecht on YouTube found an interesting way to show how frustrating.
Each turn in Hearthstone lasts 75 seconds, where the last 20 seconds are visualised by a burning rope. It might be only a few seconds, but it certainly feels more (especially if the opponent's abusing it):
Well, let's not talk about the amount of effort that went into this. And you can't see in the video what happens at the end. The rope's probably still burning.