Wrist and forearm injuries.
The picture shows the classic "dinner fork" deformity seen in a Colles fracture.
The picture shows a "Smith's fracture" which many remember by thinking of it as a "reverse" Colles fracture. With a Colles fracture it occurs with a fall on the extended wrist where as a Smith's fracture occurs when you fall on a flexed wrist.
With more severe compression of the median nerve you can get weakness of the 3 thumb muscles it supplies (Flexor pollicis brevis, Opponens pollicis, Abductor pollicus brevis). Tinel's test is where you tap over the area of the median nerve and reproduce paresthesia in the nerve's distribution.
These fractures are named from where that triangular piece of radius goes. Either in the palmar direction as seen here or the dorsal direction.
The x-rays were last sold at auction for $US 9,375 in 2015.
He suffered a Juvenile Colles fracture. I suppose wrist fractures are an occupational hazard of skateboarding.
The distal radial fracture is intra articular and usually comes from forced dorsi flexion and abduction of the wrist. Called a chauffeur fracture because chauffeurs got it when they tried to crank start old cars. This fracture often needs a pin to hold it.
Needs to go to theatre for relocation and plating. Nasty.
People use mnemonics to remember it.
Most common is probably FROG---Fractured Radius Of Galleazzi.
The man was trying to separate 2 pit bull terriers. The pit bulls terriers did not suffer any injuries. I think a lion would have simply eaten the hand.