Ironically, the fact you are turning to section 13 after being unlucky is not a bad thing. The unluckiness of this roll is like the one in Fighting Fantasy #42, "Black Vein Prophecy" where you had to be unlucky in order to be lucky enough to get the thing you needed to complete the book. Bad game design? Pshah! More like cheater detection!
So, the party come to a sticky end - a Couatl sneezes violently and snottily on the whole front row.
"Ssssssssssssssssorry!" says the creature apologetically, using one huge wing to wipe it's nose, "asssss luck would have it, my vic vapo-rub inhaler jussssssst ran out jusssssssst now so I can't attack you. Ssssssssorry again!"