Was sandblasting a pumping unit in the field. 20-40 sand, tripped over some plumbing and sandblasting my left forearm. Fraeked out when I looked at it, muscle and blood hardly any skin. Dug outmost of the sand, wrapped a rag around it and finished the day. Went to the ER and they freaked. Likea bad burn nothing they could do. Cleaned it and sent me home with lots off fake skin to use. Was back at work the next day in considerable pain. Nasty ass scar and still have 20-40 black under my skin.