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This is one of the many drop tests Lenovo conducts. The robotic arm lifts the laptop to about 1.5 meters above the ground before releasing it to see if the device can withstand such shocks.
The corner drop test makes sure the laptop is still functionable even when the user drops the device and it lands on one of its corner edges.
The tilt drop mimics how a user might put down the laptop, and researchers use such tests to make sure the HDD still functions despite the angle it is dropped from.