EE was removing a bushing. A chisel was used to create a gap between the cross shaft and bushing. EE pulled the bushing (chisel still wedged in assembly) off the cross shaft. EE tossed the bushing 4'6"" to the side. The chisel dislodged from bushing & projected upward 7'6"" at a 45 degree angle back towards EE. The chisel struck EE in the lip under the right nostril.