It's not hard: the corridor leading in is purposefully narrow (part of her contingency plan, just in case someone ever manages to find their way inside), and his width takes up the near entirety of the exit leading out into the common room. A grim, heavy barricade against what's left of Sombra's crucial mission.

Which means he gets a pointed look, the back of Sombra's tongue clicking against her teeth as she shifts her weight impatiently.

"Don't tell me she's got you running interference."