Time 'always running' in San Dimas makes no sense
Rufus tells our goofy teens that time is always running in San Dimas - this kind of nonsensical crap in time travel movies is the result, when the writers want to inject an ARTIFICIAL TIME LIMIT into a .. you know, TIME TRAVEL-movie (foreheadslap) - and we're supposed to just accept it.
HOWEVER!! (and it's an ENORMOUS 'however')
How the heck can THAT be true, when these doofuses can return to the _EXACT_ moment when Rufus had just first entered San Dimas? They meet their 'earlier selves' and we get the hilarious 'what number I am thinking of'-scene.
How can that HAPPEN, if time is always running in San Dimas? This moment is basically their PAST in San Dimas, but rufus says they can't go to the past in San Dimas, because the time is always running forward.
This makes NO sense!
BTW, did Rufus KNOW that was going to happen? Was Rufus EXPECTING the future versions of the teens to come to Circle K at that moment, and is that why he chose that exact time to arrive? How can he even arrive at that time if time is always runn.. you see how STUPID these artificial time limitation things are?
When you are making, especially a TIME TRAVEL-movie, do the F not put stupid, artificial time limitations to create tension. Maybe your movie doesn't need tension!
In any case, NONE OF THIS MAKES ANY SENSE!! AAGH!
By the way, this same criticism is valid when thinking about the 'let's come back to this time and leave the keys behind the bush / put a friggin' trashcan over my dad'-stuff (and they should've SEEN themselves there).
Also, WHY the heck does the telephone booth time machine SWAY TO THE RIGHT just before landing (just before we see Rufus enter San Dimas for the first time)? WHY?!
This kind of thing really bothers me, because it's not explained - it's almost as bad as Ferris Bueller, the confident, relaxed, calm guy having a day off in a Hawaiian theme ONLY to prove he's tense as fjordenstein, by BENDING OVER just to take a sip! HE SHOULD NOT HAVE TO DO THAT, a guy like him would rather SPILL the damn juice than 'relax' in a position where he has to not only bend over to take a sip, but ALSO LIFT HIS GOD D*MN LEGS to do it, too!
It COULD be explained that he's combining physical exercize with drinking so he doesn't get fat or something (flimsy explanation, but an explanation nonetheless), but it's NOT EXPLAINED.
God damn these 1980s writers were high or something, they put things in movies that are never explained and that make no sense.