A priest and a rabbi were sitting next to each other on a cross-country flight, when the captain came on the loudspeaker and said that the passengers should prepare for a crash landing.

The priest and rabbi both made the sign of the cross at the same time, much to the wonderment of the priest!

He was so confused that he asked the rabbi, When did the jewish people start making the sign of the cross?

The rabbi answered, What cross? Im just checking: [and here you have to make the sign of the cross, using one touch as you say each word] spectacles; testicles; bankbook; checkbook!