When starting a new world in the 1.13 pre-release I accidentally pressed the sprint key without pressing the space key and I floated across the water as though I was flying, here is a clip below.
MC-131138
1.13 Pre-Release Infinite Swimming Glitch
Resolved
Duplicate
0
Cash Belknap
(Unassigned)
Unconfirmed
Minecraft 1.13-pre1
Retrieved
Duplicate of MC-128257
Also: why is this so surprising? Jumping up and down in water was derpy anyway, this at least looks in first person somewhat good and is not gamechaning in any reasonable way.