This seems appropriate:

[In] C, you shoot yourself in the foot.

[In] C++, you accidentally create a dozen instances of yourself and shoot them all in the foot. Providing emergency medical assistance is impossible since you can't tell which are bitwise copies and which are just pointing at others and saying, "That's me, over there."
Excerpted from http://www.softpanorama.org/Lang/Cpp_rama/humor.shtml.