# Pop the TOS, but save the value
({}

    # Evaluate all this as 0 so that the TOS isn't affected, but we can still mess with the values under the TOS
    <

        # Reverse the rest of the stack onto the alternate stack
        {({}<>)<>}
    >

# Push the old TOS on top of this reversed stack on the alternate
<>)

# Reverse the alternate stack back to the main
{({}<>)<>}