Why does the reception for channel 2 improve when I drop the antennae on the ground?

It only works for channel 2. Some time ago, I posted a related thread on how to get the best reception with rabbit ears antennae.

I noticed that channel 2 was clearer than it has ever been one day. I then noticed that the antennae was on the ground. So now that is where it goes when watching channel 2.

Any explanations?