This will blow people's mental models of C (genuine example):

    #include <stdio.h>

    int main()
    {
       char const* c = "hello";

       // this is the interesting bit - n[c] == c[n] (n = number literal) !!! I swear, try it.

       printf("This program compiles and prints:'%c %c %c %c %c'\n",
          0[c], 1[c], 2[c], 3[c], 4[c]);
       return 0;
    }

    // See? I read that both forms are translated to *(c + n), 
    // which explains the equivalence. Weird, no?