https://puu.sh/EInwL.png

Helps you jump with without using sentry rockets.

First step: Get on top of the sentry.
https://puu.sh/EInyf.png

Second step: Jump and press your attack button!
https://puu.sh/EInAZ.gif

How does this work exactly?
It will automatically look up and crouch allowing you to focus on strafing. This is only active when on top of your sentry while holding the wrangler out.

Note: You have to position yourself to a point where the bullets come out of the sentry. Otherwise you'll miss yourself.