A man came over and offered his services as a painter to a female putting gas in her car and left his card. She said no, but accepted his card out of courtesy and got in her car. The man then got into a car driven by another gentleman. As the lady left the service station, she saw the men following her out of the station at the same time. Almost immediately, she started to feel dizzy and could not catch her breath. She tried to open the window and realized that the odor was on her hand; the same hand which accepted the card from the gentleman at the gas station. She then noticed the men were immediately behind her and she felt she needed to do something at that moment. She drove into the first driveway she came to and began to honk her horn repeatedly to ask for help. The men drove away but the lady still felt pretty bad for several minutes after she could finally catch her breath. Apparently, there was a substance on the card that could have seriously injured her. This drug is called 'BURUNDANGA' and it is used by people who wish to incapacitate a victim in order to steal from or take advantage of them.
This drug is four times more dangerous than the date rape drug and is transferable on simple cards. So take heed and make sure you don't accept cards when you are alone or from someone on the streets. This applies to those making house calls and slipping you a card when they offer their services.
Read more at: http://www.snopes.com/crime/warnings/burundanga.asp