creepy

That was very nicely animated and I liked the creepy floaty dudes. The guy's reaction was good too, though we really didn't see anything that would pull him out like that. Seemed cliched.
This had a cool concept, but you didn't fully build atmosphere with the short time you had. I think you could have either had all-enveloping silence until the end and then activated the ding ding seatbelt thingy or had the ding be the only sound and drown everything else out, giving an impression of inevitability, doom, etc.
Overall a neat concept, but you need to really take advantage of everything when you do these short ones. You need to make it unique, memorable. I'd love to see you make another one though!