Is that how you actually found it in your first fight? It sounds more like bravado. First time I ever fought I had pretty much every advantage physically but I got my ads kicked because he had brains. Bum rushing an opponent doesn't work unless you're called mike Tyson. He had timing and mine wasn't settled, probably any of you on here who spar would've laughed me out of the gym.
Ironically I actually lost doing what I tried to do, because I had it after only 2 weeks of boxing, was not at all prepared for the kind of conditioning necessary. Those are just the instructions my trainer told me: Fight like you've never fought before, and I fought a guy who had 9 fights and already won a novice tournament because my trainer was Floyd Sr., and it was their home gym fighter.
I did exactly as my trainer told me to do, and without a doubt it worked. I dominated the first round literally only throwing 1-2-3's, the only combination I knew lol. Just kept chucking 1-2-3's like it was mitts with my chin down and was finding contact. After the first round I knew I couldn't go 3 rounds like this, I got a brutal check on how much conditioning is required to box, and went out in the second and tried to slow down the pace. The kid I was fighting picked up the pace (he was a real smart slick guy) and he started countering my jab (only throwing one at a time because I was sooo tired) with an over hand right. He hit me twice with the overhand right over my jab, so I figured I needed to throw more than one punch and trade with him
So once again I sat down and threw a 1-2-3 as if I was doing pads, he tried to counter my jab with the overhand right but the combination came off so quick, I actually slipped on the outside of his right and landed my own right hand, came back with a left hook and dropped him. Kid told me afterwards it was the first time he had been down.
I did everything in my power to try and finish him after that and I was basically swimming in the damn air cuz of how slick the kid was, next round it was obvious I couldn't even hold my hands up and that I was tired (hell when I knocked him down, I was over here happy bout getting a rest more so than dropping him), and he started picking it up. I threw where I could and eventually ended up in the corner with about 45 seconds to go, and I decided the smartest thing to do would be to take a knee to avoid punishment, I'm winning for sure any way, and because I'm about to get an 8 count for not answering back anyway. So I took a knee (only time I've ever touched the canvas, will never happen again because I'm scarred from what happened after): got up at 4 seconds, and leaned up on the ropes ( I did look exhausted), and the referee stopped it. Said I looked unfit to continue, didn't even get hit with a punch, complete bullshit. Floyd Sr. called me a quitter and talked shit for hours. He was mad as could be. I was indeed winning up until that point, and that kid turned Open after that.
Soooo granted I got stopped in my first fight following the instructions I gave, the irony, but if I had been in shape or knew what running was or anything like that, that tactic would have gotten me a victory over a kid who had been boxing 5 years after 2 weeks in the gym.
tl;dr: Yeah, if ur in dog shape, which u should be before u fight otherwise its gonna be hell in there, go out and pretend ur hitting mitts on their head.
Disclaimer: Everyone is different, follow the advice of ur coach, most of all have fun! For me personally my coach was aware I can blitz with speed and I believe that is why he gave the instruction he did to me, but it worked for me apart from not being in any shape at all until the conditioning set in. I was bouncing punches all over the place with these damn 1-2-3's lol!
Follow the advice of ur coach and have fun.