.....http://youtu.be/5NO-fka_JTQ

Wow that was amazing. However.......

1) After sharpening the knives, one was placed in his mouth. There may be metal shavings present. Serious H&S Risk.
2) The knives handles appeared not to be rivet held. These could therefore be cheap and the handles potentially could fly off and injure a bystander. Serious H&S Risk.
3) Was there a Risk assessment as to whether the glamorous assistant has a Pineapple allergy. Potential H&S Risk.

Apart from that looks like good harmless fun!