ZFS failing on stage during demo. Is this normal behavior?

I'm thinking of migrating my server park to ZFS(not really), but this live demo makes me suspicious.

My question is:

1. Is what we see here normal behavior for ZFS?

http://www.youtube.com/watch?v=CN6iDzesEs0&feature=player_embedded#t=4m40s

Any way, this is a Kodak moment. The speaker seems not to expect what he see during the first 2 seconds. Hilarious!