2 maurezen,
Во-первых если мне память не изменяет эксполузив спелл через который описанная тобой комба действует на воздух ибо:
EXPLOSIVE SPELL
[METAMAGIC]
You can cast spells
that blast creatures off
their feet.
Benefi t: On a failed
Refl ex save, an explosive
spell ejects any
creature caught in
its area, sending it
to a location outside the
nearest edge of that area,
dealing additional damage
and further knocking creatures
prone.
For example, all
creatures in the area of an
explosive fireball that fail their
saving throws not only take full
damage but are pushed to the closest
square outside the perimeter of the
spell’s 20-foot-radius spread. Likewise,
an explosive lightning bolt moves targets that fail their saves to
outside the area defi ned by the squares the bolt’s line passes
through. Any creature moved in this manner also takes an
additional 1d6 points of damage per 10 feet moved (no additional
damage if moved less than 10 feet by the effect) and is
knocked prone. If some obstacle prevents a blasted creature
from being moved to the edge of the effect, the creature is
stopped and takes 1d6 points of damage from striking the
barrier (in addition to any damage taken from the distance
moved before then). In any event, this movement does not
provoke attacks of opportunity.
Explosive Spell can be applied only to spells that allow
Refl ex saves and affect an area (a cone, cylinder, line, or burst).
An explosive spell uses up a spell slot two levels higher than
the spell’s actual level.
А с каких пор воздух/почва стал
creature?
Так что не будет никакой реакции, даже если мы для ДНД физику применяем... Уж молчу что с точки зрения физики поняти "мгновенно" мягко говоря странно звучит