At 1759 hrs. Station 3 was alerted for an MVA on W/B Rt.50 @ Rt.213 in the 3-73 Box. Rescue 3, Engine 33, Engine 32 & Ambulance 3 responded. While enroute Queen Anne advised MSP was on location confirming entrapment and had requested aviation. Station 4 was alerted bring Rescue 4 as an additional rescue. Rescue 3 arrived on location with Officer 305 (Golt) establishing Rt.50 command. Rescue 3 confirmed one patient was trapped, while one patient was able to self extricate themselves prior to the arrival of Rescue 3. MSP Trooper 6 landed and transported the patient that was trapped to Shock Trauma, while the second patient transported by a ground unit.