in a calm matter of fact tone, "Flyinkiwi, if you don't go around right now we are going to go through the fence." He certainly got my attention back to where it should have been all along!
A few calm, well placed words will be much more usefully memorable, than any kind of panicked behaviour. The calm, well placed words can also teach that even in impending danger, the calm action will work out best, so do it that way....