Beyond jet skis and parasailing, Phuket has a smaller set of genuinely high-adrenaline activities for visitors specifically looking for them.
Paragliding
Tandem paragliding, typically launched from one of the island's hillside points with an instructor, offers an aerial view of the coastline distinct from a parasailing tow behind a boat — less commonly advertised than parasailing, so worth searching out specifically rather than assuming every beach vendor offers it.
Bungee jumping
A dedicated bungee jump facility operates on the island, offering a single fixed jump rather than the varied activities found elsewhere on this list.
Skydiving
Indoor skydiving simulators (as opposed to an actual aircraft jump) are available at facilities on the island, giving a genuine freefall sensation without needing a real jump licence or aircraft.
A word on safety standards
Regulation and safety standards for extreme sports operators vary considerably in Thailand — checking for visible safety briefings, well-maintained equipment, and operator reviews mentioning specific safety practices is worth the extra few minutes before booking any of these.