Up in the address bar. Usually the page loads and there is the symbol like an arrow in a circle and after the page loads you can click that symbol and REload the page. When the second tri address is loading, at some point a grey circle, made up of tiny grey lines, turns and turns before the page pops back to the main page. If I click it, it acts as if it were the "x" I'm used to seeing at that time, which just stops the load.
Not everyone who is having this problem shows that circle, probably. Im on a mac. And this is obviously not a mac problem, as most other posters are not on macs or using safari.