I suspect this isn't as easy as it sounds, however effective the holder is. Geese aren't by nature the most amiable of creatures, and even if you managed to catch one in the aforesaid holder, it's likely its mates would be onto you in a flash, pecking away at whatever body part they could aim most directly for.
The holding of the holder might be short-lived in such a case.
|Courtesy: Joel Bradshaw|
This gooseneck may be a two-axis swivel, in fact, with an integrated shackle for the tack. These are common. Something about the first sentence in this paragraph strikes me as having a poetic shape:
This gooseneck may be a
two-axis swivel, with an
integrated shackle for the tack.
Don't you love that last line: an integrated shackle for the tack. I have no idea what it means, but no doubt Wikipedia would inform me if I was a mind to find out. Here's another version of the verse:
A two-axis swivelling gooseneck
an integrated shackle for the tack.
Getting better all the time. It just goes to show you where a bit of creative meandering on a topic will lead you...