I would say if you're reaching in to get them from
above, that's a no-no. Same move that some predators make (think hawks from above), not all predators, but some. Same thing I've learned about my bobwhite quail chicks. Learned to
get at eye-level with them and talk to them in a sweet low voice. They'll more than likely react alot differently than they would if you're reaching from above.
I have had my gosling for going on about 3 weeks now (This saturday him/her will be 3 weeks old already and growing like crazy!), and although I haven't really had an issue like that, I have spent a lot of time with him/her since it hatched. I hatched the gosling out using one of my broody chicken hens, I was the first thing it seen, and though that may be different than your situation, nevertheless, I have a very good relationship with it, partly because him/her probably imprinted on me - well, probably a big part, and two because I spend time with him/her every single day. I take him/her with me when I go outside in the evening times to make my rounds at the chicken and quail coops, and while I'm putting out the feed and fresh cold water, him/her will set just outside the coop I'm at, and do what goslings do.

It does seem like the more older he/she gets, it is becoming somewhat a little more adventurous and likes to explore more when we're outside, I keep a close eye on him/her, and him/her is never too far away from me anyways. I have even taken him/her on small errand trips to town with him/her riding in the console. I just take along some of those XXL underpads that you can find in the "women's" aisle at your local Dollar General or
Walmart or places like that. They have different sizes. They look like a gigantic puppy pad is all they are, and I also take along baby wipes to wipe up any "accidents". I also use same thing when I let him/her be out in the house from time to time (I haven't received the goose diaper that I ordered yet). Never knew I could love a little gosling as much as I love him/her. Not sure if I'm gonna end up having a goose or gander, but it doesn't matter to me. Spending a lot of time with the gosling will help, and treats are a plus too, although I wouldn't give them too many treats that they start refusing their regular feed. Obviously I'm not an expert, as this is my very first gosling EVER, but just thought I'd offer some insight. Best of luck!
signed,
A Fellow "Mother Goose"