The DVD offers some great ideas - such as these:
Swallow and Manipulate Razor Blades
Become a Human Spittoon
Ingest an Inflated Balloon
And others
However, some
do have problems. For example, to produce live crickets from a deck of cards seems impractible to
do in any setting unless you can devise a way of catching them
Also, for us in the UK, to
get hold of the necessary item (which is incredibly cheap) to eat glass is getting more difficult,
although I am sure you will find an easy alternative.
As for drinking motor oil, you need
to take a number of days in prep work for this. I have been preparing my item for 4 days no and it
still isn't ready yet.
Balloon swallowing is suggested for stage only, but you can do it to
spectators who will stand a few feet from you. This can be quite good for drawing a crowd (if you
busk on the streets)
In and Out Tic-Tac isn't mentioned on the list here, but it is quite
nice for close-up impromptu
Overall, it does seem worth the purchase if you are looking to
include some bizarre things in your show