I have driven a few ribs in busy race start situations and its not something i enjoy at all. like all boats in the same situation, you need eyes in the back of your head and a lot of concentration.
The temptation in a rib is to get closer to the action because you usually have the ability to get yourself out of trouble with liberal application of throttle and helm but not always.....
What happens if an engine bogs down, prop slips due to too much throttle too quickly, no room due to other boats close.