explosions, armors, helmets, and decapitation

Code:
/mob/living/carbon/human/ex_act(severity)

    ..() // Logs.

    if (src.nodamage) return

    // there used to be mining radiation check here which increases severity by one

    // this needs to be derived from material properties instead and is disabled for now

    src.flash(30)



    if (src.stat == 2 && src.client)

        spawn(1)

            src.gib(1)

        return



    else if (src.stat == 2 && !src.client)

        var/list/virus = src.ailments



        var/bdna = null // For forensics (Convair880).

        var/btype = null

        if (src.bioHolder.Uid && src.bioHolder.bloodType)

            bdna = src.bioHolder.Uid

            btype = src.bioHolder.bloodType

        gibs(src.loc, virus, null, bdna, btype)



        qdel(src)

        return



    var/shielded = 0

    var/spellshielded = 0

    for (var/obj/item/device/shield/S in src)

        if (S.active)

            shielded = 1

            break



    var/reduction = 0

    if (src.energy_shield) reduction = src.energy_shield.protect()

    if (src.spellshield)

        reduction += 30

        spellshielded = 1

        boutput(src, "<span style=\"color:red\"><b>Your Spell Shield absorbs some blast!</b></span>")

    var/in_severity = severity

    if (src.wear_suit && istype(src.wear_suit, /obj/item/clothing/suit/armor/EOD))

        reduction += rand(10,40)

        severity++ // let's make this function like mining armor

        boutput(src, "<span style=\"color:red\"><b>Your armor absorbs some of the blast!</span>")

        if (src.head && istype(src.head, /obj/item/clothing/head/helmet/EOD))

            reduction += rand(5,20) // buffed a bit - cogwerks

            severity++

        if (client && client.hellbanned)

            reduction = 0

            severity = in_severity

    else if (src.wear_suit && src.wear_suit.armor_value_explosion)

        var/sevmod = max(0,round(src.wear_suit.armor_value_explosion / 4))

        severity += sevmod

        reduction = rand(src.wear_suit.armor_value_explosion, src.wear_suit.armor_value_explosion * 4)

        if (client && client.hellbanned)

            reduction = 0

            severity = in_severity

        boutput(src, "<span style=\"color:red\"><b>Your armor absorbs some of the blast!</span>")

    else if (src.w_uniform && src.w_uniform.armor_value_explosion)

        var/sevmod = max(0,round(src.w_uniform.armor_value_explosion / 4))

        severity += sevmod

        reduction = rand(src.w_uniform.armor_value_explosion, src.w_uniform.armor_value_explosion * 4)

        if (client && client.hellbanned)

            reduction = 0

            severity = in_severity

        boutput(src, "<span style=\"color:red\"><b>Your jumpsuit absorbs some of the blast!</span>")



    var/b_loss = null

    var/f_loss = null



    if (spellshielded)

        severity++



    switch (severity)

        if (1.0)

            b_loss += max(500 - reduction, 0)

            spawn(1)

                src.gib(1)

            return



        if (2.0)

            if (!shielded)

                b_loss += max(60 - reduction, 0)



            f_loss += max(60 - reduction, 0)

            src.apply_sonic_stun(0, 0, 0, 0, 0, 30, 30)



            var/curprob = 30



            if (src.traitHolder && src.traitHolder.hasTrait("explolimbs"))

                curprob = round(curprob / 2)



            for (var/limb in list("l_arm","r_arm","l_leg","r_leg"))

                if (prob(curprob))

                    src.sever_limb(limb)

                    curprob -= 20 // let's not get too crazy



        if (3.0)

            b_loss += max(30 - reduction, 0)

            if (prob(50) && !shielded && !reduction)

                src.paralysis += 7



            src.apply_sonic_stun(0, 0, 0, 0, 0, 15, 15)

            var/curprob = 10



            if (src.traitHolder && src.traitHolder.hasTrait("explolimbs"))

                curprob = round(curprob / 2)



            for (var/limb in list("l_arm","r_arm","l_leg","r_leg"))

                if (prob(curprob))

                    src.sever_limb(limb)

                    curprob -= 10 // let's not get too crazy



        if (4.0 to INFINITY)

            boutput(src, "<span style=\"color:red\"><b>Your armor shields you from the blast!</b></span>")



    TakeDamage(zone="All", brute=b_loss, burn=f_loss, tox=0, damage_type=0, disallow_limb_loss=1)