I have another great big gash in my old bald head from coming up (hard) under the handlebars.
I've done it so many times I started putting a pair of heavy winter of gauntlets over the grips. But I forget to put them on until after the gash in the head.

I cut off the front guard Interstate air scoops with a cut wheel (to mount Hwy pegs there), and I'd never used one of those things before. You can actually set yourself on fire. The tight spaces on a motorcycle mean you have to turn that thing upside down and sideways to get at the work, and the sparks fly. Some file work and then mounted the pegs.
I also swapped out (stupid) high spring rate 13" Progressive Suspension 440 shocks for a set of 12.5" lower spring rated 440s. After all the work (seat, bags, bag heat shield removed, loosen the bag guard rails, moving the jack up and down), the bike only seems a hair lower, but I didn't get to ride it because it was hot and I was whipped. So I'll try it out tomorrow.
The gash stopped bleeding.
When I look in the mirror, it looks a lot like this.