A bank robber wanted to keep his identity secret, but didn’t wear a balaclava.
He told all in the bank not to look at him or he would shoot them.
One foolhardy customer sneaked a look, and the robber promptly shot him.
The robber asked if anyone else had seen his face.
One customer, gazing intently at the ground, said “I think my wife got a glimpse”
This joke is included in the Black Book of Jokes. You can order it from here.