This actually gets me thinking...
It would actually be pretty cool to see what our resident Knifemakers could come up with using one implement and some steel.
Take the angle grinder for instance.
All you could use was a bar of 1084, or an old leaf spring (if you wanted to stick with the "don't have the right equipment" theme), and only use that for shaping.
You could use any size/type of wheel you wanted, flap, cutting, et al. But all removal of material and shaping had to be done with the angle grinder. This could also be done with a bench grinder, dremel, and other smaller, non-opportune equipment.
This would only be for kicks, and to see what is capable of being produced.
The reason I proposed this, is that this can't be the best knife made with only an angle grinder (and if it is, that is only because no one else has done it).