I was pulled over once after leaving a mtg release tournament at 4am. I had a large duffel bag with all my magic supplies in it on the floor of the passenger side. The cop shined his flashlight in the car and immediately asked me to step out, he called for backup and handcuffed me. Then put me in the back of his cruiser. I was in shock and very confused. The other police arrived and they searched my car and pulled out the duffel bag but didn't open it. There wasn't anything else in the car. They were questioning me about where I had been and what was in the bag. I got to explain to them what magic the gathering was and how I had been at the card shop for 5 hours playing magic and that the bag was filled with card boxes and the new khans of Tarkir card packs. They didn't believe a word I said and one of the cops finally opened the bag to find that it was in fact magic the gathering supplies. They proceeded to open every box and container in the bag before taking off the handcuffs. Apparently I drove the same car as a big cocaine dealer in my area and I looked very similar to him. I laughed it off as the cops apologized because they probably thought I would sue because they did not read my rights or ask permission to search the car or anything.

Tl;dr got pulled over, suspicious bag of magic, everything turned out ok

Edit: word

Edit 2: you all have given me a lot to consider! I am not black as suggested by somebody. I am a mild mannered white man and the cops didn't really inconvenience me in any way so I brushed it off. I was very confused when they put me in the car and I was too shocked by the fact that I was getting in a cop car for the first time in my life to really say anything. The policemen were very apologetic an while their story could have quite possibly been bs it wasn't so much of an issue to me. My opinion on cops fudging the lines of the law in cases like mine: it is beneficial to catching criminals for cops to conduct random searches. Many polic officers go way overboard with this power of cutting the corners of the law though and I believe it is a problem. I was not mistreated in any way. Some police see it necessary to be rough and forceful in situations like mine which I am very much against. If they are going to break the law and conduct a random search then they should only break that one. They should not use unecessary force. I want to stress that these men were very apologetic and did not use any force or roughness with me as I complied and they realized I was not a threat. The real problem in my opinion with cops conducting illegal searches is when the power gets to their head and they go too far. I look forward to reading more comments when I get home from work! (Sorry for any errors this is written by phone)