My take: this was a near miss, not a right hook. Yes, I am splitting hairs to make a point. Yes, I agree, the lead rider also turning right would have made an already bad situation worse. Maybe catastrophic. If unweighting the rear end, but otherwise staying upright, and out from under the chassis of the offending driver was the worst that happened, I'd say y'all's got off light. Lesson learned. And (IMO) the lesson is, treat ALL cars that overtake on the left as possible right hook contenders. ALL. I do not consider myself out of danger until I have actually entered the intersection AHEAD of parallel traffic on my left. If they beat me to the corner, even by inches, I am already on the brakes. Maybe they will turn, maybe they will not, I am not trying for PB's when I am out on public roads! That was your mistake. You (your lead rider) was loath to sacrifice any forward momentum on the off chance that the driver would not turn right and he lost the gamble.