Trevor Philips

Trevor's run-in with the O'Neil brothers' meth-cooking cousin lures him to a remote farmhouse, where he chases the cousin off a dirt-bike on the Stab City flats.
Hang Ten is a mission in that protagonist Trevor Philips does independently. However, Michael De Santa makes an appearance at the end of the mission.
Now free from the threat of the Madrazo Cartel after returning Patricia Madrazo to her husband, Trevor returns to Floyd's apartment, and runs into Floyd Hebert, who refuses to let him pass. Trevor barges into the apartment, where he startles Debra, Floyd's girlfriend, who has just returned from a business trip. As Trevor rants incoherently, an infuriated Debra repeatedly demands that Trevor leave. Eventually, Debra demands that Floyd leave as well, blaming him for potentially ruining her career as well as Trevor's presence and stating that "Bob" (presumably Debra's lover) was right about him, and Floyd is "not a man at all". Having had enough, Debra grabs a pistol and holds both men at gunpoint, while Floyd angrily grabs a knife in response, before Trevor condemns them for their behavior, as the screen cuts to black.
Floyd and Debra are then killed off-screen, and the scene shifts to the exterior of the apartment. Trevor, now covered in blood, staggers out of the front door. Wade arrives, wanting to visit Floyd, but Trevor, not wanting Wade to hear of his cousin's death, takes him to the Vanilla Unicorn instead. On their way, Trevor explains that Floyd and Debra have "disappeared" and will probably not return. If the player takes long enough to drive there, Trevor and Wade will engage in a conversation revealing some of Wade's backstory including first meeting Trevor and the disappearance (and implied murder) of his friends Daisy-Bell and Kush-Chronic on the way to The Gathering.
Trevor and Wade arrive at the Vanilla Unicorn, where Trevor instructs several of the strippers to take care of Wade. Trevor then heads to the office of the club's manager, Leon, and kills Leon off-screen.
The player is switched to Michael, who is in his mansion in Rockford Hills and in a phone conversation with Lester. Lester tells Michael that Trevor has taken over the Vanilla Unicorn. Michael agrees to meet there to plan the next mission.