Someone who is high up may be a mountaineer, a roofer, an aviator, a balloonist, or a paratrooper.
a call to wake someone up for an important event
Ambitious.
call an ambulance
you would call someone chuckles when he or she laughs and there tummy bounces up and down
You pick up the phone and call them ...
Pick up the cellphone open it up dial the number you want to call and press call!
Persistent
Dead beat
A neurotic
...registration?
colourblind
Most likely hyperthermia.