To make blood, open the particle editor. You can load any of the ones already avalaible, and if you'r willing to, you can edit them. yes, you can creat your own particle effect. Very nice TF2-SFM Gallery!!!!!
this is seriously my favorite SFM picture ever. Its just so perfect! The expersion on medics face, the way he's hunched over, the guns are at the right angles, the lighting, how medic is holding scout... Its just so amazing. It doesn't help that well... when ever I'm playing support in league of legends, or playing medic in tf2, this is how I feel when some one dies just before I can help them. Either be it from fire or turret diving, I feel completely helpless, and then I want to kill that son of a bitch who did this.
Besides that... here's a idea for a SFM picture, another thing really gets me is running to go save some one and they killed just before you find them. Maybe a heavy? looking for medic that got back stabbed? just a random idea...
Everytime I'm glad when I can touch peoples with my pictures. Because of this I think everything worth it and this is the reason why I'm do what I do. The emotions is more important for me. Sometimes I have deep emotions what I have to try to make wih SFM.
I know that feel because i played LoL, TF2, Dota2. Be support is hard but but the helpsgiving is good feel. (if the team don't have az idiot or something rude guy.)
By the way I like your idea. It's a very shoking situation.
It felt good to me your enthusiastic! Thank you so much and I hope you will like my next SFM picture! ^^