Someone who is high up may be a mountaineer, a roofer, an aviator, a balloonist, or a paratrooper.
call an ambulance
Ambitious.
a call to wake someone up for an important event
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 ...
Persistent
Pick up the cellphone open it up dial the number you want to call and press call!
Most likely hyperthermia.
...registration?
A neurotic
Dead beat
colourblind