April 7th note: https://modworkshop.net/mydownloads.php?action=view_down&did=19532
The mod above is now somewhat needed. Without it, you won't hear the line on all heists.

A simple silly and probably slightly obnoxious and annoying if you don't like voice line humour "mod" that makes your character shout "Jump!" when jumping.

Sadly, only these characters possess the ultimate ability to announce their jumping loudly:
Dallas
Houston
Chains
Wolf
John Wick
Hoxton
Clover
Dragan

January 8th 2019 note:
UNLESS
You use the optional addon mod, in the files section, which will use Quake jump sounds on everyone instead! ADDON REQUIRES SUPERBLT AND BEARDLIB