Help me out; Hack or not ?

[Josher]

Hello everybody,

I was thinking for a long time about a video I saw on YouTube.
Because I'm still not sure about the correct answer, I ask you ! :-)
What do you think ? Is this a hack or not ?
You must watch this video at 00:29 (sec.) <-- this is the moment that he does something strange...

Tell me what you think about this strange move...

(This video was not recorded on CubeCraft)

 

[je_moederisbae]

I think it's speed hack but I'am not sure