I have to admit the closest I've ever come to going off the end of a rwy is at BHX in a 146. Captains landing spot on in the right place right speed etc etc, and asked to keep the speed up to vacate off Rwy15. VERY slippery indeed in the wet at that end and the antiskid was doing it's stuff. Could have been very embarrasing. Beware, I for one now slow down in good time at the end of 15. Surprised it hasn't happend before.