Dudley stumbled backwards at once, a look of panic on his fat face.
1	Dudley	Dudley	PROPN	SG-NOM	Number=Sing	2	nsubj	_	_
2	stumbled	stumble	VERB	PAST	Mood=Ind|Tense=Past|VerbForm=Fin	0	root	_	_
3	backwards	backwards	ADV	_	_	2	advmod	_	_
4	at	at	ADV	_	_	2	advmod	_	_
5	once	once	ADV	_	NumType=Mult	4	fixed	_	SpaceAfter=No
6	,	,	PUNCT	Comma	_	8	punct	_	_
7	a	a	DET	IND-SG	Definite=Ind|PronType=Art	8	det	_	_
8	look	look	NOUN	SG-NOM	Number=Sing	2	obl	_	_
9	of	of	ADP	_	_	10	case	_	_
10	panic	panic	NOUN	SG-NOM	Number=Sing	8	nmod	_	_
11	on	on	ADP	_	_	14	case	_	_
12	his	he	PRON	P3SG-GEN	Gender=Masc|Number=Sing|Person=3|Poss=Yes|PronType=Prs	14	nmod:poss	_	_
13	fat	fat	ADJ	POS	Degree=Pos	14	amod	_	_
14	face	face	NOUN	SG-NOM	Number=Sing	8	nmod	_	SpaceAfter=No
15	.	.	PUNCT	Period	_	2	punct	_	_
