There is nothing wrong if you are looking for adrenaline rush. There are countless sports here in Singapore that can give you the adrenaline rush you are looking for. You can begin by trying these sports or activities:
Xtreme Skate Park
Xtreme Skate Park is located in East Coast Park. It is famous for locals and tourists. The skate park covers 1.4 hectares with various courses and obstacles. Aside from skaters, BMX riders can also use the courses and obstacles. There are surrounding barbeque pits and eateries nearby. They are open from 7:30am to 10pm daily. The good news is that the admission is free.
Ultimate Drive takes place in 1 Bayfront Avenue and 30 Raffles Avenue. Ultimate Drive will present you with the keys of Lamborghini Gallardo Spyder and Ferrari F430 F1 Spider. You can take these power cars along the Formula 1 circuit. You have to choose three routes-Circuit Tour (fifteen minutes for S$248), Freeway Tour (thirty minutes for S$398) and Ultimate Tour (one hour for S$648). They are open from 9am to 10pm daily.
iFly Singapore is in Siloso Beach Walk. If you want to try skydiving but is afraid of the risks, iFly is the best solution. The facility is considered the largest wind tunnel made for indoor skydiving. Admission fee for adult is S$89, S$79 for children and S$285 for family package of 2 adults and 2 children. They are open every Monday, Tuesday & Thursday to Sunday (10:30am to 10pm) and Wednesday (12pm to 10pm).
GX-5 Xtreme Swing
GX-5 Xtreme Swing is located in Clarke Quay. If you want to experience rapid flying together with free falls and tossed 100 metres over the Singapore River, GX-5 is perfect. Admission for GX-5 Extreme Swing is S$49 per ride and MAX-Combo (G-5 and G-Max) is S$60 per ride. They are open every day from 2pm until late.
A word of caution though, you should see to it that you performed everything safely and correctly. These activities are very dangerous that you should look after your safety always. Do not be reluctant when experts teach you the basics.