ST fatigue and "reaction to injury"

[ecz]

About the ST cost for spells the manual says:

This is the number of ST
points a wizard expends casting the spell. This is a fatigue
loss to the wizard, rather than an injury, but it is treated just
as though the wizard had taken damage, and marked against
his ST. A wizard who throws the Trip spell loses 2 ST, just
as though he had taken 2 points of damage

bold is mine.


Unless I missed something, per RAW a wizard spending 5 or more ST points in a spell suffers -2DX on the next turn and
if the same wizard spends 8+ points for casting a spell he falls down like he suffered a 8 points damage mace hit.

I have my different house rule from 1987, but as the rule appears crystal clear in the new ITL, I would know if you really consider fatigue equal to hits even for the "reaction to injury" rule.