"Reasonable suspicion" is a joke. The cop writes down that they saw someone in an area known for criminal activity acting in a furtive manner, with something in their pocket whose outline is consistent with the appearance of weapons and/or drugs. Done and done.
They can do whatever they like to harass you, including arrest you. You may or may not have a civil rights case afterwards, but probably not unless their behavior was particularly egregious.
"You can beat the rap, but you can't beat the ride."