VERY POPULAR Techno Song?? HELP!!! They play it in clubs!!?

I ALWAYS hear this song on the radio or when I'm up in the club but I can't find what its called...its all beats one part of the song is like this

like it will get real low then slowly start picking back up and it will go faster as it does

its like dun dun dun dun dun dun dun dun err dun dun dun dun dun dun dun dun dundundundundundundundundundun

er er er er er er ER ER ER ER ER ER der der der der derrr