I did an upside-down head inside the empty doghouse of a 60's Chevy Van siphon trick once...sucked on the fuel line and filled my head and sinus cavity w/ gas...puked, passed out and had a headache for days...don't try it!!.
On another Danger note, isn't Ethanol toxic if you ingest it?. I've seen some station pumps note up to 10% Ethanol content and wondered how bad ingesting some when doing the simple siphoning we all love to do?.
~ Pete
