GTA V: Random Event: Prisoner Lift 1

He was just going for a walk is all. 

As Franklin, driving north, you will come across a guy needing a lift. There will be a broken police car nearby with a dead cop inside. If you give him a ride, you will soon have some cops you will need to lose.

After you are free again, he will tell you he is a member of the Lost. You can then drop him off at their new hideout just south of the race track.

GTA V: Random Event: Zombie

The undead are among us, and they don't have a law degree

Walking around Vinewood as Trevor, you can see lots of street stars on the sidewalk. As you are star gazing, you my come across an actor zombie who makes money by dressing up as the undead. He is not all that happy. 

GTA V: Random Events

Grand Theft Auto 5 has many random events throughout the map. Some funny, some profitable, all entertaining. I am honestly not sure if you need to be certain people to get the certain events but I have marked them down as such just in case. Trevor also has a unique issue of looking for hitchhikers that he can then send to the altruist cult for profit instead of their intended destination.

It is quite possible to get these events with different people but these are the ones that I found them with.

Trevor:
RV Sex Interruption
Large White Girl Robbed
Chase Thieves Country 2
Griff the Fat Washington Patriot

Trevor Hitchhikers:
Hitch Lift 3
Crash Rescue (New Heist Driver)
Burial ($60,000)
Hitch Lift 2 (Ursula New Contact)

Michael:
Bad Bikers

Franklin:
Deal Gone Wrong

Rogue Altruists 
Domestic  (New Golf Partner)

GTA V: Random Event: Griff the Fat Washington Patriot

He is just a patriot using his right to complain

Driving West as Trevor, you see a fat guy named Griff dressed as George Washington on the side of the road with a sign saying "This is the land of opportunity, get out!". He is very verbal on is feeling about Mexican and they are not favorable.

You can go up and talk to him if you want. You will ask him about his feelings about Canadians and he will say they are worse than Mexicans as Mexicans at least have the decency to look different than Americans. You can punch his lights out with one uppercut which will make you feel better but not yield any fruit.