Find a megaphone and sing loud and proud into it. You can hide in your house and stick it out the window and sing into it when people are around or see if people start to come outside and check out whats goin on!
Pretty self explanatory press every button on an elevator with at at least one stranger in it. The more floors in the building the better the dare will be. Also be sure to stay in the elevator with the strangers and film their response.