However, I think that the main purpose of rebound is not to prevent 爆...
When using flash light, I need to control:
1) Strength: by +-EV, +-flash compensation, Flash lock, manual flash mode etc.
2) Quality of light: if hard light is required, direct hit; if soft light is required, use diffuser, rebound etc.
3) Direction of the light: by using remote triggered flash(「飛燈」); rebound with direction;
4) Color temperature: by color gel in front of the flash gun head;
5) Scope of light: by honeycomb etc
So, the purpose of rebound is mainly for softer light & change the light direction. To prevent 爆, I will do the actions in 1)