The 340-500/600 is probably the only aircraft that has the potential to drag an aircraft with brakes on!
Sorry if this was already said (didn't yet read the full topic) but a Concorde with full afterburner would "drag" on the brakes. It could not be held on the brakes at the start of take-off to check evrything was "as desired".
A few very nifty lights at about 60kts (IIRC) told you whether to carry on or reject.