Abuse dark corners of array indexing
i[array] desugars into *(i+array), and since + is commutative for pointer+integer too, it is equivalent to *(array+i) and therefore array[i].
It's not very common to see an array indexing expression (whatever)[x] where whatever requires wrapping in parens and x doesn't, but when you see one, you can swap the two positions and write x[whatever] to save two bytes.