Translation of boom

I grabbed a burger from an American fast food chain and swallowed it immediately, as I had not eaten for a while. I boarded the machine and could feel a slight stomachache but decided to ignore.
I just saw the Arsenal match. It was very boring and the atmosphere in the stadium was weak. I think that it was mainly due to the cold and not due to the quality of the game. But it was worth it.
San Telmo and Bocca were two additional neighborhoods that we have visited and these were actually quite nice. We were warned by the staff of our hotel to be alert in these neighborhoods as there were many thieves.