Odd that you would say that.

Many years ago, I realized that if I take a Vitamin B12 pill, well almost exactly 23 minutes later, I'll get like all the reflexes simultaneously.

Burp, puke, hiccup, fart, sneeze (am I missing any?)

All at once, simultaneously. The sensations would only last about 20 seconds, but those are 20 seconds of things I'd rather not experience, so I no longer take Vitamin B12...