On March 4, 2017, Kyle Chapman attended a Pro-Trump rally in Martin Luther King Jr. Civic Center Park, which located on the campus of UC Berkeley. He was dressed in protective gear, as he believed the rally would turn violent. He states the following in a documented video:
In a video, men in black can be seen trying to grab a yellow flag (most likely a Gadsen Flag), dragging a man in a kilt, and were throwing punches at people. Kyle Chapman, dressed in protective gear, began to defend himself against the attackers with a stick. Multiple eyewitnesses report that Kyle was defending Trump supporters.  The stick originally had a sign on it that said Blue Lives Matter.
A detractor posted on Facebook that Kyle is a white supremacist and was attacking peaceful protestors. A tweet from Kyle's girlfriend and video of the incident contradict those accusations. 
- Carrying concealed weapon/dirk or dagger
- Sell/furnish tear gas: MNR
- Illegal use of tear gas/tear gas WPN
- Assault with a stun gun/less lethal weapon
- Assault with a deadly weapon (not firearm)
A video shows multiple people questioning why they were arresting him and saying that they were arresting the wrong guy.
On March 6th, Kyle was released from jail on $5,000 bail.
Chapman already has served time for 2 felonies, so another conviction could get him life in prison under California's "3 strikes" law. 
Birth of a Meme
On March 5, 2017, a photo of Chapman began circulating online and he earned the title of Based Stick Man. Multiple memes about Based Stick Man have manifested on the internet that celebrates his actions of self-defense.