One of two times I've had police point their guns at me I was pulled over while driving my father's car. I opened the glove box when asked for license and registration and unbeknownst to me there was a Swiss army knife in there. Both officers unholstered their guns and the one at my window told me to slowly remove the knife from the glove box, but as soon as I touched it the other officer on the passenger side immediately yelled at me to "drop it!" Fortunately there were only two of them and after that they managed to get on the same page and avoid shooting me. The other time I was smoking marijuana from a pipe immediately after surviving a serious collision, I assume the guns were because they were mad they wouldn't be able to prove I was high during the accident (I wasn't).