EE was removing the segments on 988G loader bucket. EE was using 3/4"" air impact gun to remove nuts from plow bolts. The bolt loosened, descended allowing it to spin. EE used palm to push the bolt back to lock it in place to allow impact to remove the nut from top. The plow bolt engaged EE's glove pulling EE's hand into it and caused a severe cut across the right palm/thumb.