Doubt Hard Disk 2.5" + case USB 3.0

[cloudff7]

If you eject the 2.5" HDD in Windows 10 and then hit the HDD case with your hand, will it damage it and generate bad blocks? Did the shock move the HDD on the table?

 

[fontoponto]

When the head is in the parking position then no. If you hit it while the disk is busy then yes.
It depends on how you shock it. Just push it a bit around is not a problem.
Had a fresh 200€ disk (3.5" external) standing without support and it toppled during data access. That was it...