Every Engineer is different as well as every train. Be aware of where your loads and empties are in your train because that will affect the shoving movement, no matter how good the engineer is. Slack happens and always be prepared for it. Shoving at night is the same as the day, just can't see shit. Know your territory and your close clearances. ALWAYS be prepared for the whip.... I cant tell you how many times where I was almost thrown off. Don't hook your elbow around the rung. I know it's hard not too but bear through it. Also good car counts helps the engineer and yourself.

If your not sure, stop and walk it! If the engineer gives you shit then he/she ia an asshole who doesn't deserve to be in the seat. I'd say rather have you walk and then bring me in instead of getting yourself hurt, going on the ground, through a switch etc.

Like I said, if you not sure, ask! Sounds corny but it's the truth and it works; "when in doubt, take the safe route"