"Thrummming" the outside of the cheek with four fingers (impressive on a microphone in the middle of a monologe.)

Rubber band stretched across a wide grin.

Both work well with young-teen Christian large (500 plus) audiences.

Tommy-Knocking the top of the skull with the knuckles. (See old Three Stooges USA (Curly) for examples.

And do not neglect the universal tongue click of the eight month old infant. Phillipines, France, USA, or Russia - the "clip-clop" appears whether horses are present in the culture or not.

NOW - is there a punk/funk/junk group anywhere using this medium? I don't know Joe ... but this might be the road to headbanging headlines.

Sincerely,
Gargoyle

Thrumming three fingers over the front teeth - works well - universal appeal except for teens with braces and the aged with gums.