Crash
A building falls into the dirt when a pig with horns crashes into it. The building literally crashes to the ground when the horned pig attacks it.
Picture a pig with horns crashing into a building and both of them crashing into the dirt. Uh oh, is the pig dead?
つい
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You pull the poor pig out of the rubble of the crash. It's not dead, but it had a nasty bump to the head and now thinks it's a bird. "TWEET (つい)!" says the pig. "Tweet, tweet, tweet!" Poor confused pig.
Imagine trying to explain to the pig that it's a pig, and not a bird. "Tweet, tweet, tweet!" says the pig again. Oh dear.