You don't need to prove intent.
(1) A person commits the offense of reckless endangering in the second degree if the person:
(a) Engages in conduct that recklessly places another person in danger of death or serious bodily injury
Go back and read what was quoted and responded to. You'll understand that proving intent would be necessary in that matter.That aside...HRS §707-714 (1)(a) is about reckless behavior and the OP does not give enough detail to infer recklessness or the endagerment of others. A charge and successful conviction would still be unlikely without witnessess or an admission.
And possibly get arrested more so because you aren't cooperating. Just be honest. Own up to your mistake.
Obstruction charge?
AGAIN, you've read the response while ignoring what it was a response to...
The point was when someone lies to a police officer, they are impeding (interfering, hindering, obstructing) their investigation, which is a chargeable offense. So it's better to say nothing, than to lie. And it's not about some code of honor or moral obligation to tell the truth or taking responsibility; When it comes to a criminal investigation, you always protect yourself. Whether you did it or not, any decent attorney will tell you to know when to shut up. [Just for clarification and so you don't read into things, I'm not talking about doing some "am I under arrest or free to leave" crap that's all over YouTube. Everyone just needs to know that people get arrested all the time for statements made in good faith during "routine" questioning because they fail to comprehend that their right to remain silent exists even before you're mirandized.]
And you can NOT get arrested because "you aren't cooperating". There is no law that says you MUST cooperate or answer any questions (regardless of the circumstances). Why? The 5th Amendment.
No person shall be held to answer for a capital, or otherwise infamous crime, unless on a presentment or indictment of a Grand Jury, except in cases arising in the land or naval forces, or in the Militia, when in actual service in time of War or public danger; nor shall any person be subject for the same offense to be twice put in jeopardy of life or limb; nor shall be compelled in any criminal case to be a witness against himself, nor be deprived of life, liberty, or property, without due process of law; nor shall private property be taken for public use, without just compensation.
But hey, if you (or anyone) ever find yourself in such a situation feel free to say/do what you want. I can guarantee that if you admit to anything, you'll find yourself in cuffs, posting bail, surrendering your permit to acquire along with ALL your firearms & ammo until they decide whether to prosecute or not.