Martin Savidge has a short film for CNN that is well worth documenting, “5 Things to Do If You’re Taken Hostage”, link here. The video seems to have been posted specifically because of a recent incident in a church in France.
Point 1 is to escape if you can, but Point 3 may be the most critical – not to stand out. Point 5 says to expect to be detained by authorities to be identified after rescue.
“Not standing out” would mean you don’t want to be singled out from a crowd. Indeed, in a public place like a bank, it’s a little safer to be in the crowd rather than isolated, near an entrance. Businesses sometimes have security rules to prevent their employees from being isolated.