How to test invisable fence

Some thing tells me they didn't film this in one take either !
Reminds me of when I helped a neighbor install his. It was hot and lots of liquid was needed that day. Needless to say we tried on the collar. NEVER again.
a buddy of mine had a particularly wild chocolate lab that required the "stubborn" setting on their e-fence....he told me that if he was going to subject his pooch to it then he had to try it for of the funniest things i have ever witnessed.
Too funny! I helped my brother in law put one in years ago. His dog got zapped once and then would never leave the porch.