In this case, I have to mention a favorite scene of mine, from the end of
Stanley Kubrick's _Dr. Strangelove_. The president asks Dr. Strangelove how
long they'd have to stay in the mines to escape the effects of the "Doomsday
Machine". Dr. Strangelove says to wait a minute, and with his good hand he
starts rummaging through his pockets--and then his bad hand, the gloved hand
that keeps "Sieg Heil"ing and strangling the Doctor, comes up from his lap,
holding a circular slide rule. Dr. Strangelove does a subtle double take,
as if he hadn't expected that to happen, and then proceeds with his
calculation, finally grabbing the slide rule with a sharp, angry jerk from
the gloved hand and putting it in his jacket pocket.

Ernest.