Every warfare since humanity gained access to gunpowder proved that explosives are viable methods to end a person so no matter how naive your question sounds the answer is still yes. Questions that remain to be answered are:
- are you able to obtain (fireworks? demolition supplies?) or manufacture device with enough power to blast your head off with 100% success rate?
- can you do that without raising suspicions?
- do you have a place to perform tests and the execution without harming anyone else?
- did you take into consideration that poor bastard that eventually will have to scrape you off the walls, trees etc., depending on place you choose to die?