Sure! Here are some custom onomatopoeias for each of those sounds:
1. **Popping a balloon**: *BLOOOP!*
2. **Shaking the carpet**: *SHRUMBLE!*
3. **Breaking your chair**: *CRACKLE-POP!*
4. **Sound of a parachute opening**: *WHOOOSH-PLUFF!*
Feel free to tweak these to better fit your creative vision!