How practical are you? Humorous examples, please

And lifejackets, too?

Yup, just in case they dive and end up in water. Safety is very important. @pennynoodles:

@ragingfire: It is! Your 'Practical' Certificate is in the post.

I have tried to patent it, but they said cost is too high and laughed. May be they thought it's impractical and they have the give training to people, but at the moment of impact people just need something to latch on, no training. @pennynoodles:

@ragingfire: Probably all to do with no space and too expensive.

That could be it. I'm constantly working and thinking how to make airplanes more safer. Hopefully I'll find something that will be accepted @pennynoodles: