Please excuse the generic explanation...
I will usually super set these right after I'm doing supine
skull crushers ... & sometimes I refer to these types of presses, for lack of confusion with
close grip bench press
Here is a
*variation example* of what I believe to be a JM Press
Each different site has these exercises listed differently, one for tri's and the the other for chest, but again it goes back to FORM & muscles used all synergists.
Be very careful with the unassissted Dips & FULL extension esp. if you are just starting .. I've seen two people, as well as myself aggravate My pec minor. that which it was difficult, all other exercises (such are Chest Press [Bench or DB] and PULL work ... ) which is why I had to known down all my weights & currently work on concentric & eccentric movement. Every now & them I'll through In some unassissted Dips but usually say, "Nope not ready yet..."
Last guy was out for the same 3 weeks I was (I had 'health issues' my tie-in issues were addressed through deep tissue with with Magic Hands Katie the previos 2 weeks, and NO Hick she did NOT finish me off...

)
He was injured ... I saw him wincing the same way I was, holding the same places I was ... My first words were... "Have you been doing unassisted dips?"
Previous conversationf on his FUll ROM & potential for injury went causes these issues went unheeded .... & eventually things got worse after I made him show me a Dip .... Thos was Not really a 'noob' or amateur ... been around for years.
Pain went from Pec minor, to Pec Major, Levator Scapulae, not to EXCLUDE his lat and a huge knot where the tie in lays ... anyway, I'll stop rambling...
Just Be careful ...
Momma *B*