My wife still remarks that she'll put on our daughter's first, and I'm like please, please, please don't do that, there's a reason they say this. If you pass out, you can't help anyone else. It doesn't seem to get through to her.
It's the first time I recall seeing times printed and it really illustrates how quickly it'll hit the fan. 10 seconds isn't alot of time but the order is still critical.
I wonder if that clarity on timing would frame it better for other people instead of an open ended 'me before them' blanket rule.