I doubt it - and even if you could, how do you know that the recipient will
even be able to see it?
Also, I have to ask, why would you want to do this? Admittedly, I'm not even
a fan of animated GIFs, sound, etc. in e-mail--I'm not quite so luddite as
to insist only on plain text--but remember that e-mail is really meant for
text.