A4Q Gas eruption

[John Cooper <Jacques.Noir>]

Just got the wife a bright red A4Q.   Outside of an allen bolt falling out
of the inside of the dash (holds the clutch/brake pedal mounts up)  it's
been very uneventful to break in.  But an event occurred that has me worried
and wondering how the gas tank venting is arranged, and if safely.

Scenario:  After driving most of the day from Denver CO to Ouray over the
Continental Divide, we stopped in Montrose (300 mi) to fill up.  After doing
so, giving one squirt after the click stop to top it up, we drove the last
35mi to our destination, my garage just out side of Ouray.  Upon getting
out, I was met with an intense smell of gasoline.  Yep, further
investigation revealed gas gushing out the filler and no cap.   Musta left
it at the station, I thought, but the current crisis was to get the gas shut
off.  Ambient temp 85 deg F.  
Nothing I found I could do would stop the gushing.  I trapped as much as I
could in drain pans, with eventually about 3 or gallons erupting.  This
continued without letup for almost 15 min, until, desparate, I stuck a very
flexible oil funnel hose way down the filler neck and blew, naturally
getting a bit in the face.   Then and only then after a last blurp did it
stop.   But significant gurgling down in the bottom of the filler kept on
for another 2 or 3 minutes.
Now, I realize I'm not supposed to leave the filler cap off, but this is a
common frailty amoung car drivers, and it would seem to me I could, under
some of the circumstances mentioned regarding static electricity in these
pages, I very well have burnt the car, my house and garage down with some
gas left over.
I have not had the guts to try this again to see if I could repeat, but I
think I would like to hear from someone out there as to what happened, and
whether Audi should be notified.  I think what happened could be very easily
duplicated with someone not so knowledgeable about dealing with such
misbehaviors.
Any Comments?   Anyone else had this happen?
Thanks for any input,
Coop