#1 - On Shadow Raid, sometimes while taking the artifact, Bain will comment "There is only one place we can sell that: Marrakesh". To those of you who need a jokexplain, this is a reference to 'Raiders of the Lost Ark' where near the start, Indiana Jones states that the main antagonist Beloq, "can only sell the Golden Idol in Marrakesh".
#2 - Similarly during The Diamond Heist, entering certain rooms has Bain comment "That belongs in a museum!" along with "I swear I saw this in a movie somewhere. I hope darts don't shoot out of the walls"
#3 -'Another fun fact, is that if you actually look at the saw teeth count, it says there is 24 teeth. But if you count them all, (As shown in the picture) There is only 20 teeth.'
Shoutout to xskullgirlsx for noticing this
#4 - 'Bobblehead Bob' famous for being the civilian focused on during The Big Bank heist trailer where he took a nasty fall off of the bank, is alive and sorta well in the canonical 'storyline' of Payday. He can be seen during the Hoxton breakout Trailer hobling along
#5 - Almir's Toast and Beard, both related to White Xmas are references to Almir Listo, the lead producer of PAYDAY 2.The Toast is also a reference to Overkill's running gag of placing half-eaten cheese toast sandwiches as useless "junk loot" in safes.
Shoutout to profhershellayton for both facts
#6 - Ever wonder why GO bank looked so familiar? Maybe because its a reference to Counter Strike: Global offensive de_bank. Bain even comments after and during the heist including words such as "valve", "source" and "counter-strike". Heck some might argue that the door looks like a vault door from TF2's 2fort
#7 - Using the saw is a thankless job, yet you are one of the most useful members of the crew
Shoutout to thealmightyantler whos own Payday facts I tried my best not to copy