1111 << 1 =     1110 (4 bit)
1111 << 1 = 00011110 (8 bit)

Now consider what happens if we then go on to perform a rightshift

    1110 >> 2 =     0011 (4 bit)
00011110 >> 2 = 00000111 (8 bit)
                     ^
                     Oops