1.   Meant to run on water, it bore at one end a length of vinyl tubing and a homemade metal nozzle.

2.   Other pumps have two tubes running through the metal nozzle, one of them dispensing the gasoline and the other vacuuming the vapor.

3.   Over there, gaseous flames spurt from a metal nozzle.

4.   Some of these pumps have a wide rubber tube, pleated like an accordion, that surrounds the metal nozzle and takes in the vapor.