(Radio Iowa) — A charging bull caused an all terrain vehicle accident in northwest Iowa. Fifty-two-year old Joseph Eickholt of rural Hinton was checking his cattle Friday evening when a bull had turned and started charging after Eickholt and the ATV. In an effort to escape the bull, Eickholt drove through a wash-out causing his ATV to roll, throwing Eickholt from the machine. Eickholt was able to place a cell phone call to his family, who found him lying in the pasture. Eickholt was airlifted by a medical helicopter to Mercy One of Sioux City. Officials say his condition is not known, but determined not to be life threatening.