I often have apple and peanut butter for break at work and more than once, a particularly crisp apple would break off in my mount and I panicked as it filled my whole open mouth and very hard to remove! I've become more afraid of crisp apples!
That does sound scary. Apparently it is the reason why it is advised not to give PB to toddlers as it does act like glue.
I also that phophia of being afraid to swallow large amounts of either food or pills. I usually bite off tiny bits.