Vision of animals in a sheet:
This appears to be is coorelated to Peter being a fishermen and catching all kinds of things in his net.
gird:
This appears to be correlated to John 13:17 wherein Jesus ties a cloth garment around his waist, i.e., girds his loins prior to the washing of the feet of the apostles.
A goad is a metal-pointed stick used to drive an unruly ox when pulling the plow. Modern ones are called cattle-prods that shcok the cow like a small taser.
cf The Letters of Peter Damian: 91-120,
Being a redneck boy, growing up in the presence of other redneck boys, I can testify that the shock from a bull prod is in no way to be considered 'small'. ; ) Just sayin'.