Holding the Attack/Destroy (left-click) button while in creative mode with a sword in your hand will periodically pause all movement. Using an auto clicker (1000 clicks per second), one can freeze himself in the air.
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violine1101
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.