While walking: hitting grass with a sword the camera bobs back like you were to stop running. I'm unsure if this is intended, though it looks very weird. I haven't tested this with any other tools or previous versions of MC apart from Pre-release 3.
A video demonstration can be found here: https://www.youtube.com/watch?v=6xJ1iJUBZNI
Thank you for your report!
We're actually already tracking this issue in MC-157436, so I resolved and linked this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature in the future to see if the issue has already been reported.
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