I did a ton 4th year at all my clerks.
Both clinic and in the OR.
Also had time to check out the local area, go on dates with wife in the more fun cities etc.
If they're having you sit in a corner, it may be you and not them.
Not being malicious, it could genuinely be a lack of self-awareness on the extern's part.
As a resident- if you were lazy, stuck up, a suck up, out to badmouth other externs (or residents), you probably weren't working with us or going to any of the better cases, consults, getting face time with the attendings, hanging out with us outside of the hospital.
The residents are up to their eyeballs in work.
On top of that, they have to entertain, educate, and check you out to see if you would fit in here for 3 years.
If you are a normal person who puts in just a normal amount of interest and tries to be helpful, we made sure the experience was worth your time and you came out better prepared for the next place you were going to.