How do you blow up an egg with out using gun powder or gasoline or by putting it in the microwave?

Has to be outside


Cant use anything related to gasoline!!


Help!!How do you blow up an egg with out using gun powder or gasoline or by putting it in the microwave?
A large magnifying lens should do the trick . I'd recommend a fresnel lens from a junked overhead projector or for overkill a projection TV. The sun must be out for this method to work.How do you blow up an egg with out using gun powder or gasoline or by putting it in the microwave?
A hypodermic needle through the shell, a Luer to tube connector from


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or similar, the tube connecting to a bicycle pump and BOOM
put it in a sealed bottle and stick a compressor hose in it? More of a crushing than exploding. Maybe put it in a high-vacuum chamber. Or just plain hit it with a hammer!
The trick is to heat the core, without shattering the shell. There's an infinite amount of possibilities.
Put your girlfriend outside and let her blow it up.
You could use air pressure, that's what powers pellet guns.
Force?