Jason, Maybe I can help out with an answer.
You already know that amps are "freaking dangerous", but when you increase voltage using a transformer, there must be a corresponding decrease in amperage. A magneto carries 15000 volts, sure. A bbw igniter puts out 7000 volts. They are both at very low amperage, so they don't hurt much.
The flash circuit puts out 300-330 volts, but at a higher amperage than the bbq igniter. Amperage is a measure of the amount of electricity "flowing" through a line and an increase in amperage means an increase in the amount of electicity flowing in the line, and hence, is more dangerous. Think of it this way: Which hurts more, getting hit with a brick or 15 bricks at the same time? The single brick is the bbq igniter and the 15 are the flash circuit.
Jason, voltage doesn't kill (up to a point) but amperage does. You can get shocked several times by half-a-million volts of electricity and live happily (after some time later, heh) or die from a single exposure to the 30 amp draw you have in an ordinary household outlet.
If you're referring to a camera flash circuit (which is 300 volts) then no, it doesn't sound like much. But if you dump it into an ignition coil you get something like 27-30 000 volts.
I know you asked Joey this question, but I hope this helped anyway.