The latest Internet craze is something called the Kiki challenge.

The Kiki challenge is based on a song by "Drake". Drake happens to be Jewish. His father is Afruican American and his mother is Jewish, so he is Jewish. His real name is Aubrey Drake Graham. Drake is a singer-rapper and his song "Kiki" became a big hit and this challenge developed around it.

To me the challenge looks stupid and I don't get it. Basically, someone gets out of the car with the song playing and while the car continues to drive slowly the passenger gets out and leaves his door open and dances to the song moving with the car.

Here is a recent video of a Chabadnik doing the Kiki challenge...

I guess this has been such a big hit that the rabbis felt the need to weigh in on it.

Rav Aryeh Stern, Chief Rabbi of Jerusalem, said that this is not appropriate and is also dangerous. We need to try to be similar to God, not to the non-Jews.

Chief Rabbi of Israel Rav Dovid Lau said there is no allowance for putting lives in danger, even if it looks like a phenomenon that is not dangerous and even possibly positive. Safety is the most important.

Rav Yaakov Nechimovski, the Chabadnik in the video above, says that he is not ashamed of the openness and style by which he lives his life, as he always has. A rav needs to be connected to the people to the maximum allowed within the framework of possibilities, as long as there is really nothing wrong..
source: Kikar

I still don't get the challenge, and I do not see any serious danger to one's life, as long as one does not do this on a busy road, but if you are going to do it, gei gezunteheit...and I guess ask your LOR first...