I used to often pull this maneuver back in the old codex with Close Order Drill. When I decided to, I'd yell out "ALRIGHT MEN, FLYING V FORMATION!" and then move all of my Guardsmen base-to-base with each other in a large V shape and then charge across the board.
Rarely did it end well, but dammit it was funny as all hell. Though one time at the local GW store during a store event my Flying V Formation steamrolled (through sheer luck and Emperor being on my side) through an opposing Chaos player's thre3 10 man Khorne Berzerker squads, to a loud cheer by everyone in the store.
That was a fine day. Haven't used the FVF since the new codex, but I think I'm gonna bring it back for laughs. It likely will be viable w/ Straken and grouping into mobs of 20 Guardsmen w/ Commissars.