I was right on the threshold 17 when they landed, just a quick glance at the type and the touchdown, everything looked fine; head back to work then unusual noise, head up..aircraft in the grass....
They went off well before the intermediate taxiway; my first thought was that they tried to make this exit with inop anti_skid. But report says brake failure so , it must be so.
By the way the intermediate exits will be limited to aircraft less than 3 tons, all the others exit at the end...