Never been gutsy enough to remove a panel cover.
Were you suited up? What about other passersby?
Think of the liability you invoked on yourself here. Suppose you damaged something in your quest for a photo. Let's say, since it looks like the back-fed breaker isn't held down, that when you took the cover off, it fell out and arced. Best case scenario, you push it back in, take your photo, and all is well.
Suppose, in a worst-case scenarioa, the arcing causes so much damage that the bus bars are irreperably damaged. Now the panel needs replaced. You'd be on the hook. And the panel feeds a restaurant, or casino, so they not only sue you for the panel replacement, but lost revenue. Then to top it off, as all this is transpiring, an ambulance-chasing lawyer catches wind of your hijinks.
Kinda kills enjoying vacation.