Hopefully somewhat different ones:
Guardsman sinking into quicksand/mud.(Or being dragged underground by something)
Guardsman being electrocuted by communication equipment or something? Guardsman struck by lighning!?
Guardsman being under psychic/sorcerous attack?
Guardsman that's been run over?
Guardsman trapped/crushed under rubble.
Haemophiliac bleeding out from papercut or haemophobiac fainting from it? You decide.
Guardsman puking guts out.
Guardsman "checking the barrel" of his gun Looney tunes style.
Guardsman running with scissors.
Guardsman choking on something?
Guardsman throwing the pin, not the grenade?
Guardsman dying from boredom (ok, maybe not).
Guardsman with a broken limb or two?
Guardsman dying of a heart attack?
Guardsman being dragged/held down with hooked chains...that hellraiser style "Chains of Torment" spell used by sorcerers in dawn of war.