"Gibbs"ing ... at its finest !!!
it disappeared ....
so shall try a word picture ..
imagine penguins on the ice
one is on an ice flow ... close to the shore ( on the right, mid screen)
from the top left, a penguin comes waddling down past the one on the ice flow
with a seamless motion ... (just like Jethro !! )
the one on the ice flow hits the back of the passing penguin's head
who promptly sinks like a stone in the icy water
disappearing out of sight ...
the one on the ice flow looks so innocent
it happens so quickly you almost miss it the first time
and ... is truly "Gibbs"ing ... at its finest !!!
[ hope I can find a way that you can see this as is brilliantly funny ]