I was driving off the freeway in my ID4 and had been driving with both B mode (Regenerative braking) and the cruise control on. I then proceeded to drive approx 4 miles, still in B mode. I pulled into a parking space at my local swim club, and as I pulled into the space I took my foot off the accelerator, and began to slow down. As I was about to break to bring the car to a complete standstill, the adaptive cruise control kicked in and launched my car forward over the small concrete bollard, through a chain-link fence and into a tree stump (roughly the length of the car again). This caused considerable damage to my vehicle, but more so I am concerned for other drivers that these two drive modes conflict with each other and cause a serious safety concern. Insurance claim has been logged with AAA.