On turboprops downward, you can feel absolutely any brake application at any power. It is not true for 737 and upward jets, and this is the danger of having any inadvertent braking on. You just can't always feel it. The only way to be absolutely sure is to have heels firmly pressed down and sliding on the floor so that only the bottom of the rudder pedal, or the lower bar, is touched, especially in a crosswind. Any different and you too will be calling out "Stop!" in a high pitched voice, except in our case it was 2 words, the second of which was "....Hell!". No more needed to be said!