# SLIP OR FALL OF PERSON
> MSHA accident `220143220045` · 11/17/2014 · Pioneer Sands LLC
## Details
- **Degree of injury:** DAYS RESTRICTED ACTIVITY ONLY
- **Classification:** SLIP OR FALL OF PERSON
- **Accident type:** Over-exertion NEC
- **Occupation:** Quality control technician, Laboratory technician, Laboratory assistant
- **Activity:** Walking, Running
- **Injury source:** STEPS
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** KNEE/PATELLA
- **Days lost:** 0
- **Mine experience:** 1.06 years
## Operator
- **Controller:** Pioneer Natural Resources USA Incorporated
- **Operator:** Pioneer Sands LLC
- **Mine:** [4101371](https://api.ai-analytics.org/mine/4101371)
## Narrative

EE states was climbing stairs when left knee buckled and twisted.

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*Source: [MSHA Open Government Data](https://arlweb.msha.gov/OpenGovernmentData/) · AI Analytics · CC0 1.0*