I have heard several times as I've grown up that you can flex your muscles to make mosquitos get stuck and explode. Looking around the web, I find several sources claiming the same.
Q: If you flex your muscle while a mosquito is biting you, will the mosquito explode?
A: Yes, it's true. If you trap a mosquito's proboscis (sucker) in your skin, then it will suck until it explodes. Try it! ChaCha!1
Other site called it a urban legend.
10. They can go out with a bang
Blood pressure makes a mosquito's meal easier by helping to fill its stomach faster, but urban legend says it can also lead to their doom. Story goes, you can flex a muscle close to the bite site or stretch your skin taut so the mosquito can’t pull out its proboscis and your blood pressure will fill the bug until it bursts.
Is there any truth to this urban legend? Can mosquitoes really suck till they explode?