Oil prices, notoriously vulnerable to political events, spiked as high as $40 a barrel during the Gulf War in 1991.
We will never see a more dramatic spike in oil prices than the one caused by the 1991 gulf war.
( z1 see :polarity - :ARG0 ( z2 we ) :ARG1 ( z3 spike :ARG1 ( z4 thing :ARG2-of ( z5 price :ARG1 ( z6 oil ) ) ) :ARG1-of ( z7 have-degree :ARG2 ( z8 dramatic ) :ARG3 ( z9 more ) :ARG4 ( z10 spike :ARG1 z4 :ARG1-of ( z11 cause :ARG0 ( z12 war :name ( z13 name :op "Gulf" :op "War" ) :time ( z14 date-entity :year 1991 ) ) ) ) ) ) )