No bust...
Last summer I was in Vegas, and noticed this at one BJ table occasionally. The way the dealer explained it, if you bust during the regular play, you wait until the dealer plays, and if he/she busts, if their bust is worse than your bust, (ie, 25 to 23), then you still win. However, I think BJ only pays 6:5 or even money. I remember I walked away from the table thinking it had to be another scam by the casino. Hope this helps.