diff --git a/2019/day9/day9.hs b/2019/day9/day9.hs
index 8920cb5..8a76648 100644
--- a/2019/day9/day9.hs
+++ b/2019/day9/day9.hs
@@ -63,9 +63,9 @@ step opvec ((t,p,rbase),input,output) = case op of
     where (op,m) = getOpModes opvec
           params = paramChange m rbase opvec t
           tm_binop x = new_tm t ((params ! 0) `x` (params ! 1))
-          {-without the following DeepSeq call, thunks build up eternally
-          and the vectors won’t be garbage collected: >4GB RAM usage,
-          god knows how much with large vectors, now ~20mB-}
+          {-without the following DeepSeq call, thunks build up eternally and
+          the vectors won’t be garbage collected: >4GB RAM usage, god knows
+          how much with larger tapes (my laptop crashed), now it’s a cozy ~20mB-}
           new_tm t x = DeepSeq.force (t // [(target, x)],p,rbase)
           target = fromInteger $ case m !! (length params -1) of
                      Relative -> V.last opvec + rbase