The big stack should have shoved to isolate others to go heads up with the shortstacks rather than 3-way, you called which isnt good cause you dont know what the shortstack had.
The big stack raised him all in cause their range is usually wide
Being agressive on the bubble is a great way to build your chip stack. It's a dangerous play but can be very rewarding.
Totally agree with these two answers. When I started to follow the Pokerschool at
pokerstars, they always showed the isolation move round the bubble. On the other side, I experienced that when I did this, it was really risky to do and eventually become the bubble man. I know the feeling, why doing this on the bubble? I can't answer this, but people like to risk instead of getting into the money.